What is Sea-donkey?
1.
a fat
Wow, she is a sea-donkey
2.
A ferocious and terrifying critter that somehow evolved over the span of bajillions of years.
Oh my gosh! A Sea-Donkey! Run for your lives!!!
See
3.
A very ugly person
You meet a girl at the club and she's lookin good, then wednesday comes around for your date, and a sea-donkey opens your car door.