To be, or to bear a likeness to, a Chumpy Chode.
This is a two-word phrase wherein the words Chump and Chode have been crudely combined to form a very situational insult.
"Yeah, he's been a Chumpy Chode ever since that breakup."
"Dude, don't be such a Chumpy Chode!"
"You're acting like a complete Chumpy Chode bro."