often used in pool or billiards to describe a hustler or very talented player.

Man or woman who is very aggresive with a straight foward style attitude. Typically a man or woman with an Aggressive play style who lives independently, prefers to not to be around other people and straight forward,blunt,outspoken, little to no fears, protective of his or hers close friends and familly and has a colder heart

an overweight hillbilly who seeks sexual relations with only the dirtiest of mud sharks

(n.) An older student of Oxford University who is known for preying on younger students, especially freshers, to fulfill his or her various sexual needs.
(v.) To shark: To attempt to pick up a younger student
(v.) To get sharked: To be picked up by an older student

getting a rim job from a girl with braces

To forcefully pull a woman's skirt up/blouse off, without her consent, to expose her womanhood. Typically filmed with perpetrators face blurred.

-Skirt sharking is extremely popular in Japan whereas blouse sharking is prominent in parts of Europe.

You looked this up after seeing the definition of "Urban dictionary" did you? 😏