A Shotgun Kiss is made by inhaling weed and then exhaling the smoke into the another persons mouth and the lips touch.
I said I,
I've been waitin' all damn day for you to come on over
Girl come roll this weed up with me, I'm gon' smoke you
Come and gimme shotgun kisses, shotgun kisses, shotgun kisses to me
a violent blast of diarrhea; more specifically, the crime scene left behind by a squatter in a public stall that resembles the outcome of him/her loading a turd into a shotgun and blasting the wall.
The worstpart about cleaning up after the party was the ladie's restroom... shotgun shit everywhere!