These are the most common IDIOMS with UP and DOWN used in English:
act up = to misbehave
My son used to act up every day when he was little.
bottle up = stay hidden
He would rather bottle up rather than solve the problems at work.
break up = end a relationship
Jessica just broke up with her boyfriend.
back up = to copy something as a security measure
My computer crashes three times this week, so I need to back up all my data now.
blow up = to get angry very fast
Mr. Moore blows up almost every class because Jack is always late.
brighten up = to make cheerful, happy
My sister tried to brighten up my day when I was feeling said.
butter up = to flatter
She always butters up her boss when the new job position is available.
catch up = to share news with someone
I haven’t seen him for such a long time, and it was great to catch up.
chat up = to have a light, friendly conversation
She went to that bar only because she liked chatting up with the handsome bartender.
come up with = think of something, a plan or an idea
We have to come up with a plan!
cover up = to hide, conceal
Even in court, he still tried to cover up everything that he did.
doll up = to dress formally, to dress for a special occasion
My mom needs to doll up before her birthday party.
dress up = to have very nice clothes on
Alicia always liked to dress up for her dates.
eat up = to believe immediately
He ate up everything that his psychologist told him.
end up – to turn out, conclude
He ended up working at his father’s company.
fix up = to make right, adjust
Melissa fixed up her dress before going out.
give up = surrender, admit failure
I will never give up.
head up = to lead, to take charge
You have to head up all the meetings today.
hold up = to wait, to delay
What’s holding up the presentation?
hung up = thinking or worrying about someone/something
She was too hung up about her wedding.
juice up = to charge
I have to juice up my laptop because the battery is dead.
keep up = to continue
Keep up the good work everyone!
kiss up to = to show false flattery
Everyone knew she was kissing up to the boss to get a better job.
line up = have something/someone ready
Do you have any food lined up?
loosen up = to relax
You have been very stressed lately – you have to loosen up.
make up = to reconcile after a quarrel/fight
I can’t stay mad at you anymore, let’s make up?
mess up = to make a mistake, to ruin
He totally messed up the cake.
roll up one’s sleeves = to prepare to work
He rolled up his sleeves, and started packing.
round up = to collect or gather something
Round up the employees for the meeting!
screw up = to ruin, to make a mess
He totally screwed up on his exam.
sign up = to commit oneself to a period of employment/education
Kevin signed up for his first Psychology course online.
speed up = to make something go faster
You have to speed up your car if you want to be there on time.
split up = to separate, to break apart from the group
They had to split up in order to find Jimmy.
suck up = flatter someone excessively
He sucked up to the teacher only to get a better grade.
take up = occupy time, space, attention
It’s going to take up too much time.
tied up = very busy
He is always tied up with work.
think up = to invent or imagine something
We have to think up an excuse for why we didn’t go to school.
up the creek = to be in serious trouble
If I don’t pay the bill by tomorrow, I will be up the creek.
wind up = end up in a specific situation, place
I never thought I would wind up in Australia.
back down = to take a less aggressive position
I was about to win the argument, but I had to back down.
break down = to become unstable due to stress
She broke down today at work, so she took a day off.
calm down = to become less excited
Please, calm down before you hurt somebody.
clamp down on = to end something
We have to clamp down on illegal businesses.
close down = to stop trading as a business
Their company will close down soon.
cool down = to become less agitated
Wait till he cools down, and then apologize to him.
dress down = to scold
Jessica was just dressing down the employees.
dumb down = to convey something in simple words
She couldn’t understand the teacher, so he had to dumb down the explanation for her.
flag down = to get someone’s attention
You really have to flag down; otherwise, she won’t even look at you.
go down = to change from greater value to lesser
The prices really went down this month.
hands down = easily, without too much effort
He finished the test in 10 minutes hands down.
hunt down = to find with difficulty
It was hard to hunt down all the suspects.
jot down = to make a note
Can you jot down the main ideas from the meeting, please?
keep down = to stay quiet
Jack, can you keep it down, we are trying to sleep?
man down = to lose courage
You cannot man down when it comes to you family.
I cannot understand your main idea, can you narrow it down, please?
settle down = to establish a lifestyle, to marry
Julie and Jack finally settled down.
shut down = to end, to close
We have to shut down the party, because it’s getting late.
turn down = to refuse, to decline
Unfortunately, they turned down our offer.