A blunt or spliff filled with heroine, Crack, and sometimes weed.
Yo Joe want to come smoke a fet.
A shorthand for feter (fet rhymes with get), which is a unit of length measurement defined as a quarter of a meter. It's close to the unit of feet and is thus pronounced as "feeter", which rhymes with and is spelled in the same manner as meter. It's a compromise unit between imperial and metric systems.
Look at that giant dude! He must be at least eight fets tall!
When you run out of your fentnyl or fenty and you start getting all out of control and start worrying to much and stressing over running out of fet..
Calm down weda, don't go on a total fet fret, it's on its way.
Dumbest prick in existence, known for aggravating and annoying the fuck out of everyone who lives under the atmosphere including his own parents. 8:10 chances most mark fets are legitimately homosexual.
No one wants to be a Mark fets