If a seagull from Finding Nemo had a child, and the child started vocalising, you might call it a…?
Does anybody want to take a stab at this one? Last chanceOf all the guesses I've seen so for, Sonofjafar was on the right track.
EDIT: One more hint: neither the song, nor the movie its from, have anything to do with seagulls. The gulls from Finding Nemo are merely being used to represent a word that you will find more than once within said song.
…at least I can say I truly succeeded in describing this song badly.