That’s Google’s word of the day…

A pugilist is a boxer… but if he’s a second rate boxer, and we want to insult him, we call him a palooka. If e’s really stupid, and not even good enough to be a palooka, we call him a stumblebum.

pugilist \PYOO-juh-list\, noun:
One who fights with the fists; especially, a professional prize fighter; a boxer.

pa·loo·ka noun
Sports. An incompetent or easily defeated athlete, especially a prizefighter.
Slang. A stupid or clumsy person.

stum·ble·bum noun (Slang)
A person regarded as blundering or inept.
A punch-drunk or second-rate prizefighter.