In normals terms a piff is a penis-fart.
Person 2: Yeah dude what movie are ou *PIFF* t.
Person 1: Gross. Did you just piff?
- Friend: "Alie she is...but she aint for yu doe"
- Boi: Allow yu man
Yo pass that piff nigga I don't got all day.
Damn nigga, that new mixtape is str8 piff.