A man or woman that a person keeps within a relationship for the sole purpose of not being alone; Company in bed at night and a sexual playmate. The bedwarmer doesn't always know it and is under the impression that the person actually loves him or her.
Ann: Why do you keep him if you hate everything about him?
Jane: I get lonely at night and I don't want to just sleep around with random men
Ann: So he's just like your bed warmer then?
by FlamingPsycho June 1, 2012
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A male subject who chooses to keep his cock inside a vagina post sexual intercourse, purely for the sake of keeping his member at a pleasant temperature.
Chic says "So hun, are we done?", as he lays on top of her. Dude says "Nah, my fella needs to be a cock warmer for a bit longer."
by Etak_soda September 9, 2011
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One who doesnt get called up into play, hence sitting through the whole game and "warming the bench".
"Hey coach, can I finally join in?"

"Nah, why dont you do your part and warm the bench."
by tranquillo June 7, 2005
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A shot of alcohol e.g.; too make one happy.
We stopped for a Core Warmer because we were feeling cold.
by nyrabp March 14, 2010
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A girl who is strung along by a boy during the Wintertime purely for sexual gratification, to be inevitably dumped in the Summertime when the going is easy.

If the girl falls in love too soon, is high-maintenance, or pleads to spend more time with her boyfriend than he is willing to offer, the relationship may end abruptly, shortly before Xmas or Valentines Day. But if the girl finds conditions to be congenial and bites her tongue the relationship will run early- to mid-Summer, at which point she is discarded so her ex-boyfriend can go on the holiday he secretly booked solely for himself when they were still together.
Dylan: You're the perfect winter warmer
Kristine: What did you just call me?
Dylan: Oops! I mean, we'll always be together
Kristine: Promise?
Dylan: Yeah sure :p
by Raxteri January 10, 2012
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When you are having sex and you put your belly on there back or ass
I was at this Halloween party and I gave this girl a heat warmer
by Big jamo April 24, 2023
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An individual (typically female) who unwittingly enters into a part-time relationship during the coldest season of the year, as drinking establishments close early and opportunities for casual sex become less available yet prohibitively more expensive, merely to satisfy someone's needs.
Distinctive pattern of a winter warmer:

- (Autumn equinox)
- Boy snares girl
- Boy invites girl to residence for sex
- (moment of climax)
- Boy turns on Sports News channel
- Girl gets bored and goes home
- Boy smiles
- (Spring equinox)
- Boy ends relationship, goes nightclubbing
by One Unintended January 7, 2012
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