To fart, to pass wind.
Used when I was young (1-10 yrs of age) coz if we said 'fart' we got our asses kicked.
Me: *sniffs* what on earth is that?
My bro: I farted dude. want it in cupcake form?
me: shit dont let mum hear you swear!
me: you mean YOU FLUFFED, right?
my bro: ... yeah I... fluffed. excuse me
*mum approves of our language correction and leaves*
me: you fuckin stinkyass