Kickin' Butt and Takin' Names

So Max likes to take the game Risk and he has me put out some guys and he gets guys and then they have a little "war". He took a cannon and just went over most of my guys, tipping them over. Suddenly he says, "They're kickin' your butt!" Where in the world does he get this stuff! I don't think we have ever said anything like that. So strange and yet funny!