Hyfy 

Acronym for "Hell yeah fuck yeah". Used in excitement and concurrence.

Dude A: "Are you going to the show tonight?"
DUde B: "HYFY mannnnn!"

Hyfy by 40heaven December 1, 2010

Hyfy 

(Adj) The state of being Hyfy can either be good or bad.
1. Being extremely happy, excited, or anxious.
OR
2. Being extremely mad, pissed, angered, or frustrated.

(Good) A boy just got the best Christmas present ever, he is considered hyfy.
(Bad) Someone just lost a big game/bet and is in a very hostile mood, then he or she is considered hyfy.
(Bad) "Yo I'm about to knock this dude out, im so hyfy"
(Good) "I was so hyfy when I saw my new shoes"

Hyfy by Kjolly January 20, 2008

HYFYTWU

Abbreviation for HELL YEAH FUXK YEAH THAT'S WHAT'S UP, usually used in the Roughest of Rough Countries by the leetest of leet

I made sure all the cleaning supplies were freshly stocked and I left you a fat blunt in the usual spot....

HYFYTWU!

HYFYTWU by Hugh Vahgyna November 27, 2025