Anyone who is in a relationship/partnership who is clearly not wearing the metaphorical trousers, or in more extreme cases, only worked with/dated by the other for superficial reasons I.E - money or looks, and while everyone else can see this, they cannot.
Good looking woman walks into a crowded bar and pushes her way to the front, and without asking the small nerdy guy on HER arm what he wants, she orders the drinks.

ONLOOKER 1: "woah check out that blonde!"
ONLOOKER 2: "...check out the sidecar"
by razzamatazz October 20, 2005
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When one engages in coitus with a colostomy stoma, using the stoma as a site of entry for a cock or some other pleasurable instrument.
The philadelphia sidecar I got from Tom last night nearly perforated my bowel!
by Nursy January 15, 2009
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Ostomy sex. The act of putting a penis into an ostomy site, be it a colostomy, ileostomy, etc., for intercourse. Popular among prisoners as a means to get cigarettes or pay off debts.
You didn't know Gilman was into Philly sidecars? Where do you think he picked up smoking?
by uptodate April 30, 2008
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A supporting Karen who tags along with another more dominant Karen. They seem involved but are just along for the ride, and they are used by the dominant Karen to accomplish their goals.
Sheila brought a sidecar Karen with her just to get that $20 gift card.
by Smul September 6, 2021
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Similar to Malaysian Plinko, however in this particularly nasty version of stoma sex, a male participant inserts his penis into a persons Colostomy opening.
Guy: "What on the menu?"

Pro: "Are you a cop? No, well then, Hand Job $20, BJ $50, straight sex $200, or my specialty, Detroit Sidecar $400."
by Hey Guy… March 1, 2013
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This is when a female is driving a vehicle with a male in the passenger seat and she leans over to give oral sex to the male passenger while he grabs the wheel
"yah dude while me and Tracy were driving over here we had a little Swedish Sidecar action going on"

"Dude , next time Michelle drives .. BAMM!!! Swedish Sidecar time"
by Raven7.0 November 17, 2008
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