momo

(noun) a playful insult; short for the word moron; closely related to the terms bafoon, blockhead, fool, idiot, jerk, and silly goose

That momo cut me off when I was driving home!
Stop being such a momo and get back to work!

momoish

(adj) being a momo; stupid; idiotic

It was a momoish move not putting water in the EasyMac!