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1.
What you call the pillow that you fuck in a hotel room.
After 4 martinis and 2 hours in the lobby bar trying to get laid, I decided to just go upstairs and fuck the pillow bitch.
by Rob Santos January 22, 2008
 
2.
When two males share a pillow together, usually after a night of heavy drinking.
Dude, did you see Dunn over the weekend on the couch? He was totally being a pillow bitch with Jimmy.
by Drunkasaurs Flex May 15, 2011
 
3.
Another term for fuck buddie or girl on the side.
"Hey is that your girl friend?"
"No man, that's just my pillow bitch."
by Pillow Bitch May 21, 2014