Top Definition
To rip off, scam, or swindle someone in a personal financial or otherwise transaction. An action violating fiduciary responsibility.

Typically involving retirement or investment assets. Also to perform an unsuitable action in business and personal relationships for an improper personal gain at the other parties expense.
You rolled a 401k into a VUL? You gilnered that guy.

Damn, you called my girlfriend last night after I left? Damn bro quit trying to gilner me!
by Matt R. E. January 29, 2008
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