Top Definition
When referring to a man's erection as a boner, a boner shrinker would be anything that diminishes it. Most likely an unattractive woman. Made famous by the 9/13/2008 opening skit of Saturday Night Live dialog by Tiny Fey and Amy Poehler:
FEY AS PALIN: "So we ask reporters and commentators, stop using words that diminish us, like 'pretty,' 'attractive,' 'beautiful.'"

POEHLER AS CLINTON: "'Harpy,' 'shrew' and 'boner shrinker.'"
by ChiGal September 21, 2008

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A woman that is ugly, bitchy, harpy, shrewish, or has any other unattractive characteristic that makes her sexually undesirable to a man. Said of a woman that temporarily kills sexual desire because of physical or personality traits that do not a man want to have her.
Joe: "Kate is a Boner Shrinker."
Alex: "Yeah, she ain't very pretty."
Joe: "Not just that, but she is a complete bitch. That is what I meant."
by skidale September 20, 2008

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Someone so unattractive that it totally turns you off, AKA makes you lose your boner.
On SNL, "Hilary Clinton" called herself a boner shrinker.

I was getting so horny checking out a hot underwear model the other day- then a guy so ugly walked in that I was completely incapable of staying aroused. What a boner shrinker.
by Kr1574 October 16, 2008

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(noun). Comment, concept or event that is a sexual turn off (especially to men). Libido suppressor.
Hillary Clinton is a real boner shrinker - If I need to take a cold shower, but don't have access to water, I just imagine her face or voice.
by oslodude September 23, 2008

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A woman who is completely undesirable.
She's so ugly, she's a boner shrinker!
by Cori Stahl September 16, 2008

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An person, place, or thing, that is so repulsive and unattractive, that it results in an immediate and complete loss of a boner upon visual perception. In extreme cases it is impossible to get quality wood ever again in the victims future.
KayLeigh is an extreme Bonershrinker.

Dude, don't look at that damn Bonershrinker, or your space needle will become a space noodle.
by Somewhiteguy1994 April 25, 2009

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Any situation that causes you to lose your boner very rapidly.
1. When you are masturbating and your parents walk in giving you a "Boner-Shrinker".
2. Waking up in the middle of a sexy dream with a hard-on next to your FAT UGLY companion lover giving you a "Boner-Shrinker".
3. When you are at the beach with a bunch of hot chicks and you have a boner. Then you get in the ice cold water.
4. Hilary Clinton would also be considered a "Boner-Shrinker"
by 1pseudonym145 October 15, 2008

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