The origin of this word came from the mind of the Chung's. It could be used as a noun, or an adjective. There are multiple meanings to this word.
1.weird, nuts, out of your mind.
2.butt, ass
3.William Chung
1.I can't believe you did that, you are so peegou.
2.Your outrageous idea is very peegouish.
3.You are so dumb, you are acting like peegou.
When you go to pee and end up pooping a little bit too. Or vice versa, when you go to poop and end up peeing simultaneously.
Monica went to the restroom because she needed to go pee. Once she started to urinate, a little bit of poop began to come out simultaneously. She didn't even realize she had to poop...she ended up peeooping.