A person who is constantly asking others for a piece of gum.
Caron is such a gumbum! Everyday after lunch I hear her asking everyone around the office if they have any gum. She needs to get her own pack!
by stally September 09, 2010
1 more definition
some complete idiot who sits in gum on the bus the day they are due to start a new job! convenient!
by Caroline July 09, 2003