The amount of time you have to defecate after feeling the initial 'twinge' in your bowels. Length of allowable time varies drastically by person, and type of feces: Usually anywhere from 'right the fuck now' to 72 hours.
John: Ooh.
Alice: What?
John: I have to poop.
Alice: Ew, go ahead.
John: Not now, I just felt it, my shit window is usually 48 hours.
Alice: What?
John: I have to poop.
Alice: Ew, go ahead.
John: Not now, I just felt it, my shit window is usually 48 hours.
by HatchetmanRalph March 10, 2016