A pretty obvious "euphemism" me and my co-workers use is:
"Hey, you wanna hit up the spot today?" (Would you like to hotbox one of our cars after work with a blunt or two?)
"F'sho" (Yes, we'll bring our cars from point A[whereever we're parked] to point B[the inconspicuous spot away from most other cars] in our work's parking lot and smoke lots of weed)

Haven't hit up the spot in a while though... hopefully tommorow my boy hooks me up with some mids so I can get HIIIIIGGHHHH!