A fish lung is somebody who is a fool and is very weak. you may call somebody a fish lung if they back out of a fight or can not do something that concerns physical action
by daniel clarke February 5, 2007
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a fish with lungs, this fish cant breathe underwater but breathes above water filling its lungs mounted in the tail fin
yo dude that lung fish is breathing over there
by Llama_galama August 23, 2019
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