1 C1 slang
To drink coffee or other caffeinated drinks, especially in quantity, to boost energy or alertness.
"I need to caffeine up before this all-day meeting — I barely slept last night."
caffeine up
C1 slang intransitive
To drink a large amount of coffee or other caffeinated beverages to increase energy and alertness.
In plain English
Drink lots of coffee to wake up and feel more energetic.
What does "caffeine up" mean?
One main meaning — here's how to use it.
Literal vs figurative
Words literally mean
To load up on caffeine.
Actually means
Drink lots of coffee to wake up and feel more energetic.
Usage tip
Modern informal expression, especially common among students and young professionals. Primarily American English. Used humorously or casually.
Words that pair with "caffeine up"
Natural word combinations native speakers use most often.
coffee espresso morning energy drink before exam
How to conjugate "caffeine up"
The five tense forms you'll use most often.
Base
caffeine up
I/you/we/they
3rd person
caffeines up
he/she/it
Past simple
caffeined up
yesterday
Past participle
caffeined up
have + pp
-ing form
caffeining up
continuous
Hear "caffeine up" in the wild
Listen to native speakers using "caffeine up" in real YouTube videos — click a clip to watch it on Looplines.
Other ways to say "caffeine 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.