Top Definition
A pain in the stomach from an immense need to shit. Often used as an excuse to get out of doing things, in a way it's almost like the male version of period pain.
"Hey, dudes, I have to go. I have a mad shit ache."
"Fuck that dude, you are such a piker"
"I'm serious dude, I'm about to shit all over the place"
av Blaine Ray 16. november 2007

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Where you have to take a shot so bad your crotch hurts
I was at the Gas Station and I had such a bad shitache, I thought my crotch was gonna fall off
av Superstriker104 22. oktober 2015

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Where you have to poop so bad your crotch hurts
I went to the Gas Station because I was having such a shitache, I thought I was gonna lose my crotch 🚀
av Superstriker104 22. oktober 2015

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If you give a girl (or a guy) an ass rimming, and you've opened their anal cavity so far, what you will have once you are done is a circle of shit around your face and chin. This is whats known as a shitache. (Like a mustache, but made from shit)
I gave this girl such an ass rimming, when I had finished, I had a shitache.
av Nema 29. mars 2006

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