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In Super Smash Bros., the side special move (also commonly called forward B, side B, smash B, or over B) is a special attack performed by pressing the special move button with the control stick held left or right.
Link's Side B allows you to throw a boomerang at your enemies.

Kirby's Side B allows you to smash enemies with his hammer.

Snake's Side B allows you to launch a missile from his Nikita.
Side B by ReKuTo November 10, 2019
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Recycling the usage of your dirty undergarment by flipping it inside-out on it's "side B" which is supposedly cleaner than it's "side A". People who're lazy to do their laundry do this all the time.
"Dude isn't that the same Calvin Klein undies you were wearing yesterday when we went to the beach?"

"Don't worry man, it's on it's Side B"

"That's just gross dude..."
Side B by JBarry May 11, 2008
Someone who's a loser and/or an asshole.
Dude, you're such a side B.
Side B by mulletboy August 13, 2009
Way of saying Side B theology; essentially used by those who experience same-sex attraction (therefore are gay, lesbian or bi) who do not affirm the lifestyle choices but rather opt to follow traditional Christian values such as marriage only being between a man and a woman, and sex only being for such marriages.
Yeah, I'm gay but I'm Side B so not gonna marry a guy.
Side B by catpeesweeties December 15, 2025

B-Side Bombers 

A rowdy group of rugby players that play immediately after a varsity squad and consistently crack heads and stay dangerous
A: Fuck, our A-Siders lost a close one.
B: Hey, we can still drink though, the B-Side Bombers kicked ass!
B-Side Bombers by appi2224 October 30, 2021
A b-side was originally known as the song on the flipside of a 12" or 7" vinyl single that backed the A-side, but wasn't the song promoted or received the radio play. Today CD singles have b-sides along with remixes, even though ironically CD singles only have one side that is used. With CD singles dying a slow death today, b-sides are becoming a rarer commodity. B-sides were originally used to make a single worth the buyer's money and to get fans to buy the singles along with the album it came from.

B-sides are usually songs that do not appear on the actually album that the A-side appears on, ocassionally it does. The b-side song was usually determined not to fit in with the overall sound of the album or it was considered not good enough to be on the album or just plain leftover tracks, so hence it's usage as a b-side. B-sides have often gotten a reputation of being filler and sub-par, even though a good majority of the time b-sides are better than a lot of the album tracks, and in some cases, better than the A-side.
"Autumn Goodbye" is the b-side to Britney Spears' 1999 single "...Baby One More Time."

"Heartbreaker" is the b-side to P!nk's 2006 single "Stupid Girls."
B-Side by starsinthetwilight February 19, 2009
The other song that isn't the "hit" (A side) on a 45 (7inch) piece of vinyl. Less popular second choice. Often coveted by audiophiles for its rareness. Also known as the flipside.
"Dude, which Cure album is that from?"
"It's a bunch of b sides from their singles."
"Wicked."
"Totally."
B Side by modross July 25, 2008
More from Urban Dictionary

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026
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