Simple Definition of tinhorn
: a person who talks and acts like someone who is strong and powerful but who is really weak, unimportant, etc.
Full Definition of tinhorn
: one (as a gambler) who pretends to have money, ability, or influence
First Known Use of tinhorn
Seen and Heard
What made you want to look up tinhorn? Please tell us where you read or heard it (including the quote, if possible).