The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
or freak·outnoun Slang
- An experience of frightening feelings or hallucinations, especially as a result of taking a drug.
- An experience or scene of unrestrained excitement or irrational behavior.
- One having such an experience or participating in such a scene.
freak-out - Phrases/Idioms
Experience or cause to experience hallucinations, paranoia, or other frightening feelings as a result of taking a mind-altering drug. For example, They were freaking out on LSD or some other drug. [Slang; mid-1960s]
Behave or cause to behave irrationally and uncontrollably, with enthusiasm, excitement, fear, or madness. For example, The band's wild playing made the audience freak out, or It was such a close accident, it really freaked me out, or She freaked out and ended up in the psychiatric ward. [Slang; 1960s] Also see flip one's lid; wig out.