An animal that resides underwater, you sick bastard. Get some help.
Jim : Hey let's do that 'shark' thing together
Tom : Jim what the fuck is wrong with you
Girlfriend: let's shark tonight.
Boyfriend: Which beach do you want to do it on.
The real definition is a aquadic sea creature that lives deaper on the ocean and feeds of smaller fish.
I know why you're here. You looked up 'urban dictionary' and found the top one by 'To be' that said when you looked up 'shark' it said it was a way to have sex.
Well sorry to burst your bubble but a shark is in fact a sea creature.
Person 1: "A shark is a sea creature."
Person 2: "Really? Urban Dictionary supposedly says it is a way to have sex."
Person 1: "i t s a f u c k i n g s e a c r e a t u r e"