Crystals found in weed; They are collected in a grinder, in order to enjoy later in a nice keef blunt.
Ahmed: Yo i just got done breaking up the bud, check out all this keef on my hands T
Fady: Yo you know you gotta put em in ya gumsth bro
Ahmed: What the #@!&, this isn't coke bro whats wrong with you
Fady: Whoopsth
Another way to say Keith....also a gd nickname if you want to call someone a car mechanic who has a shaggin' wagon, owns a ford escort and is the 'best car mechanic in town'