noun
git
GIT/ɡɪt/
A foolish or contemptible person.
The British character calls his rude neighbor a git.

Etymology
Scots get meant an illegitimate child or brat, connected with beget through the idea of “what is got.” That insulting child-label broadened into a general insult for a foolish or unpleasant person.
In context
and as a young man I discovered he was a bit of a git really.
Stupid git. Everyone thinks he's so great.