Annoying , obnoxious, unpopular person.

A man in his 40's that still lives with his mum with delusions of grandeur .

Has no motor vehicle license, mum still drives him to therapy sessions.

Worries and obsessed about the size of his penis .

Has difficulty making friends , his paranoia sometimes means he lurks and hangs around men nearby to overhear what they are saying about him.
That Finnster has no life except for the false one he created.

I just saw a Finnster riding a bike with the seat removed .

I wish Finnster would stop hiding in the bushes watching us.
by TreehuggerNZ August 21, 2022
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1. A name given to a student by a teacher, in relation to his sneakyness and/or laziness.
2. A nickname for somebody named Finnian
3. A computer/phone hacker
1. You is a slacker, Mr. Finnster.
2. Hay Finnis J. Finnster, what's up
3. That guy beigeboxed me last night! What a finnster!
by Mr Cnowledge June 13, 2009
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