It is the act in which a man cums into the ass of the woman he is currently pounding, sucks his own cum out of her ass with a straw, immediately shoves a finger into her gaping asshole, fishhooks her with the 'rusty' finger and spits his own semen into her mouth... thus creating the Rusty Shrimpbowl.
There really is no example that will completely encompass the awesomeness of the Rusty Shrimpbowl. Regular Shrimpbowls are available if you omit the rusty finger and fishhook.
by NeverQuik68 June 20, 2011