An action that violates established rules or agreed-upon principles; a portmanteau of the words "Bullshit" and "Jishaku" (a tabletop game involving magnets).
I'm sorry, Steven, you can't droptwo stones in one turn: That's bullshaku.
Aggressively hitting on women by force. Often times the "Bull Shark" will be extremely drunk/creepy, and grabbing girls that are not particularly interested in them. A patented "Bull Shark" move would be to grab the girl's face and forcibly make out with them.
Labeling somebody a Bull Shark works best while at the beach. Not only is there a "marine life" undertone in its name, but the beach is a prime location to hit on unsuspecting women, allowing you to creep from one bathing suit to the next.
Chris: Dude, look that creeper over there Bullsharking the fuck outta that girl.
Adam: Wow, she wants nothing to do with him. She keeps walking away from him, but he keeps buying her shots, asking to friend him on facebook.
A term derived from the outburst, "That's bull, Shack!" Signifies that the previous statement or command is unnecessary for further development as a contributing member of society.
Teacher: You will now write thirty essays over the development of the Britishneo-Nazi party.