Pre-Spray
(Verb) Pre-spraying is when someone knows that they are about to take a massive shit, like a bomb; a volcano; the big one, so they spray air freshener before hand so they don't have to bare the stank and/or so they don't have to spray as much air freshener to rid of the stank afterwards.
I had Taco Bell last night, so I pre-sprayed the bathroom before I shat because I knew dat shit was goin to stank.