Cab Stab
When you are in a vehicle of some sort and you see a cab/taxi you yell "CAB STAB" whilst pretending to stab the person next to you in the gut.
*taxi rolls by* "CAB STAB!"
Extra-Cab Stab
Fucking a girl in an extra cab pick up truck through the back window
I was extra-cab stabbed the other night; there are ball marks on my window