An annoying bird that likes to hang around water and makes annoying squawking sounds. It is imperative that you stay away from these gross "flying rats" because there is a high change that they will steal your food or shit on your head. Not a nasty sexual act, just a gross bird.
Person 1: A SEAGULL!!!
Person 2: AAAAHHHH *runs away* DON'T SHIT ON MY HEAD!