someone who is really lazy and doesnt do any work, but is cute about it at the same time. a nubnub is often a nickname for people named louis.
girl : wow he is such a nubnub
girl2: at least hes cute about it
1337@usumpalyer1: Hehe... look at those little nubnubs running around like idiots!
supaleeth@%0r2: Goddam, do any of them even know how to switch weapons yet?