Example 1:
Person 1: Where in the hell is Linda?
Person 2: She's takin' a shit.
Person 1: Again? That's the 3rd time today!
Person 2: Yeah, she's a real crapper.
Example 2:
Person 1: Bro, you're listening to *Christian rapper's name here*'s new song?
Person 2: Yeah, I like listening to crappers, so what?
Keeping the bathroom clear of others when your trying to take a private dump by scaring them off with a toilet paper rattle when they walk in.
Dude! I was trying to pinch out a loaf at work today and I successfully used the "Crapper Quarantine" technique to keep several people out so I could dump in peace and solitude!