meowchat 

A type of role playing phenomenon in which humans, generally female, adopt the personality of one of their cats and chat or write in a cross between baby talk, malapropism, and literal phonetic spellings. These cat figures take on a life and personality of their own which become quite real to those involved.

Dis here cat is weally weally imPURRtant and wuves to meowchat wiff hims fwends.

meowchat by Portia Neff December 28, 2006

meowcat 

Another way of saying something is awesome or horrible, depending on the tone of voice it is said in.

"You got to meet Andy Samberg?! That's so meowcat!"

or
"This homework is taking forever. This is so meowcat!"

meowcat by meowcat1091 December 30, 2009