1 definition by Wilder of Fancy

HAFN

A snarky, yet workplace-safe way of saying "not in a million years", it's the acronym for "How About Fuck No", usually used in email or instant messaging, but completely acceptable in polite conversation also.

"So, are you going to share that winning lottery ticket with me?"
response
"HAFN"

by Wilder of Fancy December 23, 2009