1 C1 idiomatic slang
To make someone or a group very excited and out of control.
"The DJ crazied up the crowd with a sudden drop in the bass."
separable
crazy up
C1 slang separable transitive/intransitive
To make someone or something extremely excited, wild, or chaotic; to act in a wild or uncontrolled way.
In plain English
To make someone go crazy and very excited, or to start behaving in a wild, out-of-control way.
What does "crazy up" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 C1 idiomatic slang
To behave in an erratic, chaotic, or wild manner.
"Things really crazied up after midnight when everyone had been drinking."
inseparable
Usage tip
Very informal and relatively rare. Mainly heard in North American slang. Not widely established in standard dictionaries — learners should treat it as a marginal expression. Often used in contexts of parties, excitement, or reckless behaviour.
Words that pair with "crazy up"
Natural word combinations native speakers use most often.
crowd party fans music energy
How to conjugate "crazy up"
The five tense forms you'll use most often.
Base
crazy up
I/you/we/they
3rd person
crazies up
he/she/it
Past simple
crazied up
yesterday
Past participle
crazied up
have + pp
-ing form
crazying up
continuous
Hear "crazy up" in the wild
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