a fake last name that a select number of people think is real. it can only be thought of when two girls get bored one night and feel the dire need to combine their last names.
The opposite of a wingman. A finman is someone who gets rid of unwanted suitors for a friend, helps their friend focus on getting one person and weeding out the creeps.
(Name finman because that's the name of the first guymy friend and I chose to apply this to.)
"I want to get back with him but all these guys keep talking to me and getting in my way."
"Don't worry dude, I got your back, I'll finman you."