When 2 or more cats run down a flight of stairs, causing a rumbling sound and knocking over everything in their path. This often due to excitement and/or food.
"What happened to you, James? You look like you got in a fight."
"No, no...I just got caught in a catalanche and was swept down the stairs."
Any person that has ancestry originating in the Iberic region of Catalonia and speaks Catalan.
They're known to be fierce defenders of their opinion, their culture, being just a tad stingy, and (only some of them) their wish to free their homeland from Spain.
They can be seen anywhere in the globe as tourists (there's 1 in a 342 chance of a tourist being a catalan) or hard working immigrants, but their natural habitat is Catalonia.
Dude, everywhere I go, I we've met at least one catalan!
Even to that trip to Iceland?
I saw no less than 3!
Usualy Italian, big nosed and hard headed. Has a tendency to shout really loud and be really competitive. Once he\she has a girlfriend, defends her\his questionable hotness like it is life.