A word often used to describe dangerous dog breeds such as Bullterriers (Pitbull, Stafford) and Mastiffs (Rottweiler, Dogo Argentino, Boerboel) because they tend to have large jaws, sharp teeth and muscular bodies, which goes with the ability to severely injure and kill other humans and animals.
"My crappy neighbour recently bought an American Pitbull Terrier, the jaw was so huge that it reminded me of some kind of land shark. I heard they kill more people than all other breeds combined!"
by Notyourmother123 May 10, 2020

by krammed94 June 7, 2021

You know damn well what a shark is. You searched urban dictionary on urban dictionary because you're bored.
"Shark" is not a god damn sex act. "Sucking a dick." Is a sex act, go get out there and do some sex acts instead of looking at urban dictionary.
by Surrenderthecat April 23, 2023

When you have a girl laying on a bed, naked, and you surprise her by sneaking into the room, while prone, and jumping up to give her oral sex.
by KodsterJonester June 19, 2011

When a male sits on a female's (or another male's if you're into that)'s face and they chomp his balls. The balls are the minnows. The chomper is the shark.
"Hey, man, what's going on with you? Why are you limping like that?"
"Sarah and I played sharks and minnows last night..."
"Sarah and I played sharks and minnows last night..."
by Skunk Rat March 29, 2021

when you've had a nasty blaster stuck up there all day and you can't help but moan when it comes out, to both express your relief and alert nearby casualties.
*moan*
what was that omg
that was just john sounding the shark siren!
shark siren?
yeah, to let us know he is relieving himself anally.
oh
what was that omg
that was just john sounding the shark siren!
shark siren?
yeah, to let us know he is relieving himself anally.
oh
by jubilousjohnjumoingforjoy October 12, 2021

April 3rd, we will all show our love and affection towards "SomeRedShark", a moderator of Floppa's Cafe, a 5k member discord server.
by Physresoul April 2, 2021
