The term usually given to a Rainbow fish from Krypton like off the Superman Series who goes round quelling the danger of nearby foes in the ocean...(Like Nemo)
Oh my god Adam you quell end
Oh he Quelled The Danger Woah Adam you Jedi
Quell Your Mum blud
quell fish bitch
An exclamation to indicate that, whether it is said in French or English, what has been noticed or brought to attention is bad, shameful, or embarrassing.
Can also be used to describe someone acting in a rotten, terrible, horrible or mean way.