A term made famous by the Collegehumor movie Coffee Town
He's a great guy. I went in there the other day and took a very adult shit. When I walked out, he walked in. I went back in there and all the skid marks... completely gone! That guy... he's a poop chipper.
A Poop Chipper is a male who purposefully uses his urine in order to 'chip away' someone else's fecal matter. The Poop Chipper is commonly seen as a 'good guy', a person who uses his urine for the greater good.
The act of shitting into a sink, then "flushing" by running the garbage disposal. Performed as a last resort, only when all other toilets are in use. Frequently involves beer shits the morning after.