What is the origin of the word "flollop" ?

Question

I.e Does it pre-date Douglas Adams??
Is it a real word?

Answer 1

It isn't an English word, I can tell you that much.

Answer 2

flollop
1. A method of locomotion used by seals and similar mammals on land whereby they propell themselves by bouncing along on their bellies.

It is unlikely that a seal found in rural Lancashire could have flolloped four miles from the sea.

2. The art of crawling in a sleeping bag, while racing other sleeping-bagged people.