The Toronto tandem jump is a sexual act performed during a threesome that involves two males and one female. The smaller male of the two allows the larger male to penetrate his anus, and then proceed to lift him up and fuck him into the girl.
Dude last night I got the best of both worlds when we did the Toronto Tandem jump.

A penis and a vagina? You must have been lost in a carnal nirvana.

Ya and he made us both bleed.
by The Michelan Man January 9, 2009
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Whilst one man is having a standard shit wank, a second man sits on his lap cowboy style and shits between his legs, whilst simultaneously jerking them both off with theirs cocks pressed up against each others
I was having a sneaky shitwank when my man lover Plunky sat down on my lap and joined me for a good ol nullagine tandem cowboy shitwank of monstrous proportions. We simultaneously owned the toilet whilst setting off jizz fireworks all of the bathroom ceiling
by Bumfluff June 25, 2014
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A way cool beast that Jake and Finn wish for on an episode of Adventure Time. It looks like 2 conjoined elephants, with orange goggles on each face and golden shotguns for tusks. It also has rockets on it's feet and can shoot a purple beam out of its trunks. If anyone ever comes across one, and you are wondering how it is controlled, just remember; you don't control it, you must let it give you control. It will know if you are worthy to command him because he is psychic.
Finn the human: What should we wish for Jake?

Jake the dog: Something only two bros can share...

Together: Ancient Psychic Tandem War Elephant!!!!!!
by p5yclone May 13, 2011
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An act of stupidity thought of by one person and executed by another.

This type of stupidity is associated with initiations of various types (usually dumb)and military service(hopefully not as dumb)
Was that real what I just seen or an act of tandem stupidity ??

Is that person really crazy or is there someone screaming through them in an act of tandem stupidity to discredit them?
by Ragnar Funnies September 8, 2018
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It's nothing nasty, I just want to learn German.
- Hi Tinder-person, would you like to do a German tandem with me?
- Ja, I would like that
by TinderDerbyChris May 12, 2020
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