Half of this site's definitions.
I searched the word "Gas station" on Urban Dictionary. Apparently a gas station extremely erotic sex move according to this one definition from 2008.
A sex position in which you do it in doggy style but the male is slapping her ass like an African drum. Also, like bongos.
Damn, the Erotic Percussion position got me laid last night by Starkeeesha and Le-a (Ledasha). It makes me tingle like anime and xvideos.