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A splinter in the ass,usually done while moving from a sitting position on wood or wood-like materials. A splass is very irritating and will hurt if rubbed against.
Me:Today i was trying to scootch over on the bleachers during gym and in the process, I GOT A SPLASS!
Them:A what?!
by taywer February 19, 2015
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When you are taking a shit and the water from the toilet splashes your asshole, it is a splass. Most common used is past tense: splassed
"Damn it, I just splassed myself in that public bathroom!"
by Airwayangler January 04, 2012
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