In english currency a pound is a quid. squid is the plural of quid, and i dont know why.
A boke owes another bloke six quid. He goes up to this bloke with an octopus with a little tentacle bandadges up, and says, 'hello mate heres the sick squid i owe yu.' Do you see? DO YOU SEE?? Sick squid - six quid??????? the marvellous juxtaposition of... look, we jus call pounds squids. leave it at that. try and get n with people.