A swimsuit that resembles the male briefs underwear. Often worn by athletes or guys who are swimming for exercise, but sometimes worn by old fat hairy men who don't know that they should be covering up. Named after the company "Speedo" that first started making them mainstream swimwear.
Advantages: provides support for your testicles and keeps your penis in a more comfortable position while you swim. Allows you to use your legs better when you swim, and doesn't fill up with air like normal trunks.
Disadvantages: shows off your whole body and only covers your privates, which makes it very disgusting to see old fat hairy men wearing them. Also shows off the general size of your private parts, which can be embarrassing if you have a very small package, because everyone would see your small bulge. A speedo without a decent layer of lining in the front will also make it very obvious if a guy's penis is circumcised.
Yesterday, I went to the beach and there was a fat old hairy man wearing a speedo, so even his own family was embarrassed of him.

For my high school swim team, we all wear speedoes, so girls came to watch our swim meets to check out the bodies and the packages. But that makes Johnny embarrassed, because his package is small and has basically no bulge in his speedo.
by imdoingstuffrightnow July 28, 2005
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Speedo is a tight swimwear which is the Best for fast swimming. I am in a swim club here in europe and all my mates wear them
Friend: What swimsuit so You wear for the training tomorrow?

You: I wear my black speedo of course!
by Nic_Dandy June 23, 2019
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What you wear for swimming and being sexy.
You: Hey babe you like me in my *spanks ass* Speedos?
Her: Please Fuck me now
by cooldudesixtyfour January 17, 2018
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Too short shorts. Such as the type ballers wore in the 60's and 70's. Sadly many men still wear too short shorts today. See Wal-Mart,K-Mart or Piggly-Wiggly for examples.
"Bro, did you see the dude playin ball in those speedos. I'se 'fraid he'de hang a nut"
by CBad Da Shredder December 7, 2011
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What you DON'T want to see on men, fat women, and old women.
I can't even go to the gym anymore without seeing a bunch of Fatzillas wearing tight Speedos.
by AYB March 10, 2003
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A female who is obsessed with male swimmers, specifically
the ones who swim for Boston College and Nathan Adrian.
"I'm obsessed with swimmers, their bodies are perfectly shredded. I guess you could say that I am a speedo chaser"
by Thunthunthun October 15, 2013
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A boy where swimming is his life. They mostly live in speedos and definitely own a Speedo backpack.
Person 1: “Look at Kyle’s Speedo backpack!”
Person 2: “Yeah he’s definitely a Speedo Boy. I mean he wears one all year round.”
by Bobbio Santana October 17, 2019
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