单词：guffin'
when a female (or if you're gay, a male), while performing oral sex on a male, [deep throat]'s a penis, and makes that "guff" sound as they gag...
> Hey Ally, are you guffin? Damn, that bitch can guff! Troy's guffin mad dudes...
> Hey Ally, are you guffin? Damn, that bitch can guff! Troy's guffin mad dudes...