jabronie
A guy who talks big but can’t back it up. He’s a waste of oxygen.
My friend is a jabronie. He said he could beat up the whole football team, but he got beat up by the school janitor.
That guy at the wrestling match was a jabronie. He talked trash but got his ass kicked in five seconds.
My sister is a jabronie. She said she’d beat up her best friend, but now she’s hiding under her bed.