This is a euphemism for going to the toilet - the blue lagoon is reference to the use of blue tablets that colour the water in the toilet.
Sorry I was late, I was feeding fish at the blue lagoon.
by Theodore H Biscuit October 12, 2010
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Feed the fish

Noun. A sexual act, sprinkling powder on the clitoris prior to coitus.
Did you know that if you feed the fish it makes sex more intense?
by MrJantastic January 15, 2025
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definition-
fuck them

quoted by Trenton T Curtin
Person 1: your friends are assholes.
Person 2: Fuck em and feed em to the fish.
by Tr3nt0n T Curt1n May 15, 2024
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