When a man is erect and bends backwards on all fours and walks around with his "dorsal phin" in the air. "You may make noises while doing so". It can be done alone but preferred you have a partner to chase around.
Last night my boyfriend started shark attacking me. He wasn't fully erect so it looked more like Free Willy's fin.
by Rede36 April 20, 2014
Get the shark attackingmug.