Skin-tight jeans, called such because they're so tight the fart stays trapped between your buttcheeks or escapes upwards through the pussy lips.
"Damn that girl's lookin fine in them skinny jeans"
"Hell naw, those are fart trappers. Her pussy be smellin like a Waffle House bathroom"
When you have sex doggy-style and ejaculate on a girl's back in the bed of a pickup truck.
"I gave Heather the ol' redneck paintjob last night"
"Yeehaw!"