A sexual act involving three dicks being inserted into
three holes. While possible between humans, the act was designed for a kangaroo and three monkeys, as kangaroo females have three vaginas and monkeys are flexible.
Originated from Seussical the Musical, which features a kangaroo and three monkeys named the Wickershams battling some obvious
sexual tension.
Doesn't have to be rape, but it helps.
The wickersham brothers saw the sour
kangaroo and decided to Wickerslam her.
Jack: Hey, see that girl
over there?
Alan: With
the pocket on her chest?
Sean: She looks like a kangaroo.
Jack: I have the sudden urge to wickerslam her...