After rereading multiple times to understand it, i think it means the small blob wanted land so “give clay”, the other big bullies didn’t want to contribute, so started taking from the sea.

“give clay”. The Dutch wanted to have clay for their world famous clay baths…

In the language of Polandball comics, it means “give land/territory”.

“Gib” is taken from the German imperative for “give!”

Best theory is that “clay” as “land” originates from a bad machine translation.

It seems somene created a Wiki that covers these terms: https://www.polandballwiki.com/wiki/Terminology#Clay