A Tandem Bike is a bicycle with two seats and two sets of pedals, allowing a couple to ride together. Requiring as much team work as a trust fall, but with fast moving traffic to fall in front of when it fails. A good way to test how strong your relationship is.

On conventional tandems, the front rider steers as well as pedals the bicycle and is known as the captain, pilot, or steersman; the rear rider only pedals and is known as the stoker, navigator, or rear admiral.

The term Tandem refers to the arrangement of the riders one behind the other rather than the number of riders. Bicycles for three, four, or five riders are referred to as "triples" or "triplets", "quads" or "quadruplets", and "quints" or "quintuplets" respectively. One such familiar to UK TV viewers was the "trandem" ridden by The Goodies.
1. That's an awesome Tandem Bike, but you should know that your woman on the back isn't peddling.

2. I was riding my Tandem Bike, and she must have been working harder because it was easier to peddle. Then I realized that she Fell off my bike

3. Your car has broken down! Don't worry, there is a spare seat on my Tandem Bike. Just sit down, put your feet on the pedals, and don't lean to the side while peddling.
by AussieGeoscientist March 17, 2011
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One chap having sexual congress with two ladies at the same time
Hey bro, after we left the pub past night those two slappers went tandem rodeo on me, I've got clap at both ends now!
by vodkasaurus August 12, 2014
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When two heterosexual couples are fucking side by side without engaging in a 4-way or orgy.
It was a real nice night...Chris and I went out to the bar, brought a couple girls home and did the texas tandem on his tempur pedic.
by WayneNetworks October 3, 2011
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A birthday that both you and an acquaintance share.
Hell's yeah brother! Happy tandem-birthday! XD
by Marquis8 December 26, 2011
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When two people facebook together as a team

They comment on & "like" the same posts mere minutes apart. They also share pics & tag each other on notes. One will take the same quiz, add the same app, join the same group or become a fan of something immediately after the other one does. This type of facebooking duo constantly posts on each other's wall & shares inside jokes & obvious intimate understanding of their vague status updates. They may chat with each other on facebook even though they are sitting in the same room & could talk audibly instead.

These people come across as insecure, lame, cheesy & noobish in the ways of facebook. Everyone appreciates the feeling of belonging & being a valued part of their facebook crowd, but tandem facebookers take it too far & ironically alienate themselves to a degree. Tandem facebooking lowers social value even though the duo may find a huge sense of security in navigating facebook together. They may be trying too hard to look active on facebook or be too lazy to cultivate an original presence there while an ideal lies more to the middle of the spectrum.

One of the easiest ways for tandem facebookers to overcome this label & demonstrate independent thought & confidence is to sometimes wait a few hours between posting comments or clicking "like" on the walls of mutual friends.
Person A: "Oh, that group you just joined sounds funny! I'm gonna join it too!"

Person B: "No, wait! Wait at least a couple of hours so people won't see that we're tandem facebooking!"
by Hip Mama February 7, 2010
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Referring to someone who has been fucking two best friends, either consecutively or simultaneously. Can be a girl or guy.
Have you heard about her? After she broke up with Josh she started fucking Will.
Yeah, she's a tandem bike
by whatevvs666 May 1, 2011
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A tandem bike with the express purpose of picking up chicks by offering free rides
Bob: What's up with the tandem bike?
John: I like to ask girls who are walking to class if they want a free ride- Great way to pick up chicks
Bob: Dude! That's totally a tinder tandem bike!
by Manda+JaMiS January 11, 2017
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