The anus. It is also know as the butthole, fecal dispenser, cigar cutter, the moist, poop chute, crap cooker, colon, fartbox, shit lips, sphincter, ol' crusty, etc.
Dude, I have to pass a loaf so bad that I can hear it. If I don't get to the toilet soon it will slide past the turdstile.
by JEUNT December 04, 2010
Similar to the mechanical device that people pass through one at a time at train stations etc, a turdstile is someone who constantly chat shit and makes up bullshit things, slinging them out one after the other.
by kazherine March 20, 2020