To make flat (something rough, folded or bumpy).
No comments yet — say something.
(idiomatic, of a hierarchy or inequal distribution) To become more even.
No comments yet — say something.
(slang) To win a fight, usually by punching someone until they are knocked over.
No comments yet — say something.
Add your own interpretation of "flatten out".
Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.