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1.
A fridgilante is a person in your office or other place of employment who, being fed up with all of the old food items that have been accumulating in the fridge and cluttering it up (some of which might still be good), throws them out. This can be done with or without warning.
"Hey! Where's the sandwich I left in here last week?"
"...looks like a fridgilante took matters into his/her own hands"

ADJECTIVE: Fridgilante justice is the only way to keep our work fridge from overflowing with old, spoiled crap.
by Bernie-Roy May 17, 2010