A Derogatory term for a mentally retarded person.
"What the hell you just told the president to shove it, ya mongokong
When you banging a hooker and put the money in her asshole but when she takes it out it's filled with dirty hooker skat
Thus the name peanutbutter dollar
Tyron: yo I was banging this skanky ass hooker the other night and I put the money in her ass
Labron: bruh you gave her a
peanutbutter dollar