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1.
wearing a fedora to the bar which transforms an otherwise creepy, awkward guy into a chick magnet. Derived from the lyrics of "Fosty the Snowman."

"There must have been some magic in that
Old silk hat they found.
For when they placed it on his head
He began to dance around."
House is planning on pulling a frosty again at the next Rum Runners show
by p fete April 01, 2007
 
2.
Leaving with no warning or reason and not even having the common courtesy to tell anyone.
Don't tell me Frosty's pulling a frosty on us.
by Ch4lk April 13, 2010