When a gentleman caller tries to impress his female counter-part by engaging in behavior that would typically be more understated in normal situations.
Kevin: Look at Matt yelling at the TV like an idiot. He barely even likes baseball.

Ray: I know. He's just show-horsing because his girlfriend is here.
by Jack Parkman November 4, 2009
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To show one's age. When an older person makes a comment or action that refers back to times long since past and shows just how old they are, generally alienating the younger generation a bit in the process.
My grandfather made a reference to Howdy Doody today. Man, was he showing the horse and cart.

Also showing your age
by JacintaK July 6, 2009
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When a Gay man dates or even marries a woman to distract from his obvious relationship with another man. This is from the fact that a show horse isn't typically the one ridden the most.
"Yo, have Steve and Claire even slept together?"
"Dude, don't you know? Steve is totally Show-Horsing, he's been going out with Matt for months"
by Danchisco12 March 27, 2021
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The plastered bright toothy smile of Meghan Markle . Correct use of (Show Horsing) is to hold the smile in whatever event one is at to include: garden parties ,bank robberies, funerals, catastrophic life loss, and speaking events.
Meghan Markle attended a memorial service for a school shooting and the bitch was "Show Horsing" all the time.
by Stinky1911 July 29, 2023
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The act of a women having sexual intercourse with a horse.
Guy1:Hey dude I heard a women was having a Finnish horse show. Guy2 Noway!
by Mello jello March 4, 2015
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The act of a wreath being placed, either deliberately, or accidentally around ones neck.
james Was hanging Christmas wreaths on a ladder on the front of the house, he dropped the wreath, and I got show horsed
by JoeJoeDPlate December 14, 2019
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