I do that too but yes, it is weird. Nothing wrong with that though. I like weird. That's why I like Regular Show. It's just the right kind of weird :)
Having said that, I kinda think "punch the prime minister" sounds more like a euphemism for rubbing one out, to people who haven't seen this episode or any episode of Regular Show, which makes me a little concerned that that's what people think I've gone to the bathroom to do whenever I say "I'm gonna go punch the prime minister" :P