Top Definition
The most badass person who just doesn't give a damn
An infantry man whose gone balls to the wall is "grunt as fuck".

See that man not caring he's "grunt as fuck"
by gmangrunt February 17, 2014
5 Words related to grunt as fuck

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.