A bris is a circumcision "ritual" performed by Jewish people. That said, let's get the 8 year old South Park definition. "It's when you cut off your wee wee". That definition will have changed the life of the children and cause Kyle to hide Ike from his parents so he won't get his penis cut off. This episode was awesome, and also hilarious. I mean really hilarious. Mr. Mackay doing drugs and floating like a balloon after a hit of LSD? That's just funny. But you shouldn't do it.
After Stan discovers that a bris, which Kyle's little brother is having, Ike, is when someone gets a circumcision. But, Stan thinks a circumcision is when you get your "wee wee" or penis cut off. That said, Kyle hides Ike to Nebraska. After a fake funeral when Kyle discovers that Ike is Canadian, Kyle tells his parents where his little Ikie poo is and he hates him. Soon, he'll discover family isn't who's blood you share, but who you care about. And that's why his friends are sort of like more than friends, but like family.. except for Cartman.. and Cartman doesn't want to be in Kyle's wee wee chopping family.
This episode was hilarious and awesome. I enjoyed it and I recommend this episode for South Park fans.