Means either Marijuana, or to smoke marijuana. Also pronounced as Harshup, Parshum, & Parshup. Can also be used as one word to mean, Hey, I got weed lets smoke it. Or Do you have weed?
EX 1 - Hey! Can i cop $10 of Harshum from you later?
EX 2 - Yo I got that fire! Wanna go Harshum?
EX 3 - Harshum?!