Speedos are tight swimming shorts for men.
Speedos are often worn by men who want to swim fast or show off their bodies.
Examples:
He wears speedos at the beach.
Do you like my new speedos?
The man in the speedos is a good swimmer.
He thinks he looks cool in his speedos.
He wears bright red speedos to the pool.
The lifeguard wears speedos when he saves people.