1) A bumbling, stupid, inept person.
2) A confusing
mess; a conundrum; any chaotic situation
3) A person of low
intelligence who gets himself into a comical quandary.
"Frank just took off for the store and forgot his
wallet again. What a chucklefuck!"
"When the storm
hit in the middle of the parade, the whole festival became
one big chucklefuck."
"That chucklefuck Frank got drunk and drank from that shampoo bottle."