When an attractive woman walks by and makes you think "naughty" thoughts, instead of "nice" ones.
"Damn! That bitch is fuckin' up my christmas!"
by dancinpete January 15, 2007
Fuckin up my christmas is a new way of saying fuckin up my shit, this is not so much a holliday oriented term as it is an exclamation of dismay at the sight of a beautiful woman
she's fucking up my christmas
by mc chris April 18, 2003