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1.
A combination of gas, fecal bits, and bile filled diarrhea that spray out of one's anus in a rainbow projectile fashion.
Hey bro, I was fucking pissed at that bartender chick who quit giving me free drinks, so I went into the bathroom and blasted skittle shits everywhere. I even shit in the soap dispenser.
by Assbag666 May 27, 2013
 
2.
when you eat a lot of skittles or something that gives your shit more than a few colors.
hey tyler howd you do on your test today? i failed it cause i was up all night with the skittle shits

hows about them skittle shits?
by Tylor M August 16, 2006