v. to get a lot of work done in a short amount of time, esp. highly tedious or insanely difficult work like reading or really long essays.
Sorry I couldn't answer your call yesterday, I was shitathoning
by Sue Dough Nimm February 19, 2009
When all the stalls in a public bathroom are full.
Mike: Man, I need to take a dump.
Dan: Ok, I'll wait
Dan: Why are you back so soon?
Mike: Couldn't go, it was a shitathon in there.
by shameus.burp September 03, 2009

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