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Slang for any jock, especially on the swim team, for various reasons.
"Let's piss off the speedos and put jello in the pool."
speedo by Maddawg February 19, 2005
Swimwear that is like briefs. It's often worn if you are on a swim team. It shows your package so if you have a baby pee pee many people will notice it.
It is bad enough that Bill is made fun of for his one inch hairless dick at 15 years old in the showers. However, the hottest girls in the school have been coming to swim meets and looking at the guys bodies. Unfortunately, one of them is a girl in which Bill has a crush on and is emberassed that his one inch hairless package gives him no bulge and everybody laughs at his baby dick in his speedo.
Speedo by Jr23115 October 8, 2013
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.
Speedo by imdoingstuffrightnow August 24, 2005
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!
Speedo by Nic_Dandy June 23, 2019
its easy to see whos got a thick cut cock when men are wearing speedos
speedo by 8 inches January 18, 2004
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"
Speedo by CBad Da Shredder December 7, 2011