A salty seabird is when one's penis is sliced length ways so it resembles the beak of a bird. However, it is not a proper salty seabird unless salt is then added into the wound.
Tom: Did you hear? Jack's gonna get a "salty seabird"!
Jack: *Cries
While boning an attractive female, upon finally reaching climax the male pulls out of which ever southern oriface he has chosen to pleasure. He then finishes on either the back or stomach and proceeds to slurp it up with his mouth, like a zamboni.