Someone who constantly repeats the same lame joke they've already told you 3,000 million times before, expecting that the 3,001 millionth time you're bound to laugh.
Retarded Monkey Fuck: Hey, what's brown and sticky?
Other Guy: I don't know, jackass. Why don't you tell me?
Retarded Monkey Fuck: A stick! Haha!
Other Guy: I'm so glad I have zoloft...
1. Someone who has a plan which they consider great at the moment, but in retrospect, does not seem very good. Infact, it seems horrible.
2. A hilarious insult. Geared towards mentally ill apes and arangutangs, or more likely someone on that level.
1. "So, the Sarge said my plan had merit, but it was executed poorly."-Grif
"Bullshit, Sarge said were a retarded monkey."-Simmons
2. "Dude, you are such a retarded monkey, now how do I spell check?"-The Omega Master