An unwanted person following you or a group of friends in order to try look popular, but failing to do so and getting no attention or respect from the group. Usually walks behind the group and doesn't talk at all.
Liam was totally rashing on our group yesterday, it was fucking annoying!
the action of people "usually african american" running away from the police, and or law enforcment usually brought on by the act of being an idiot.
bro, we were obvi rashing SO hard last night, after we were done being crunch at the club.