1 C1 slang
To drink coffee or caffeinated drinks to increase energy, especially before a demanding task.
"We cafd up at the campus coffee shop before the three-hour chemistry exam."
caf up
C1 slang intransitive
A very informal, clipped form of 'caffeine up': to drink coffee or energy drinks to boost alertness.
In plain English
Drink coffee or something with caffeine to give yourself more energy.
What does "caf up" mean?
One main meaning — here's how to use it.
Usage tip
Extremely informal, mostly heard among students. 'Caf' is a clipping of 'caffeine' or 'cafeteria coffee'. Very niche and unlikely in any formal context. Primarily American student slang.
Words that pair with "caf up"
Natural word combinations native speakers use most often.
before class morning study session exam
How to conjugate "caf up"
The five tense forms you'll use most often.
Base
caf up
I/you/we/they
3rd person
cafs up
he/she/it
Past simple
cafed up
yesterday
Past participle
cafed up
have + pp
-ing form
cafing up
continuous
Hear "caf up" in the wild
Listen to native speakers using "caf up" in real YouTube videos — click a clip to watch it on Looplines.
Other ways to say "caf up"
Swap in when you want variety — tap a linked one to explore it.
Keep exploring
Jump to every phrasal verb built on the same verb, particle, or level.