smartass

A mule/donkey of unusual intelligence

that's one smartass you got there
my smartass died
im gonna beat your smart ass

dumbass

a donkey, or any other similar creature of unusually low intelligence

Guy: Come and buy this dumbass cheap
AnotherGuy: Damn that's a dumbass

sop

Actually it means, Standard Operating Procedure

Pee in the cup soldier! It's SOP!