PIBO

Parent In Biology Only

My dad's not really my dad. He's just my PIBO (Parent in Biology Only).

Ditch diaper

Diapers tossed out the windows of cars by traveling families too lazy or too redneck to toss it into a proper waste bin once they've stopped. Eventually, the stinky wad lands into the ditch to keep the roadkill company.

I got run off into the ditch and fell headlong into what must've been a ditch diaper. I thought I'd never get the stink off me.