(n.) The fictional spider used to lure curious roommates, girlfriends, siblings, etc into an utterly destroyed bathroom. Once inside the bathroom, the door is closed and forcibly held while they get to enjoy the fruits of your labor.
"Hey, you've gotta come see this bathroom spider...you ever seen one like this?"
(Curiosity brings them into the room to investigate...and you close the door behind them)
"So where is it? Oh you sunova bitch (coughing), I can taste your ass and I think my nose is bleeding! Lemme outta here...I'll do anything!"