Homosexual intercourse; referring to lesbian vaginal sex.
Jackie and Stacy were going bumper to bumper last night...and by that, I don't mean their cars.
by randomlysmart April 14, 2014
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When There is a traffic jam and the cars almost touch each another.
Traffic Jam
Oh man, look over there: there is a terrible bumper to bumper on that road.
by Marcelo Rodrigues August 2, 2007
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Grabing on to the bumper of a stopped car and then haveing them pull you along as they go. This is done only when the streets are ice or snow covered so that the bumperer can just slide along as the car goes.
It was snowing outside so my friend and I went bumpering.
by sfcjking February 26, 2011
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A rolled cigarette made using the leftover tobacco from other unfinished cigarettes.
Unlike other definitions here, this is actually used in the real world.
Australian origin.
Unemplyed guy 1: Fuck I'm outta ciggies cunt!

Unemployed guy 2: Shit, we'll have to roll a bumper.
by Dickhead Savant November 28, 2014
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(Verb) “To Bumper one’s crypto” - A boss move of absolute brilliance where a savvy crypto holder uses the Bumper protocol to shield their tokens from the unpredictable swings of downside volatility.

Derived from the innovative DeFi protocol, this action combines technological prowess with financial wizardry, offering a safety net in the roller-coaster world of cryptocurrencies.
“Dude, I just Bumpered my whole stash of ETH. I ain’t afraid of no bears…”
by Pope_of_defi July 3, 2023
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