Hawt = A late 1940's and early 1950's acronym for "Having A Wonderful Time."
Now the word is used on the internet as slang for something reeeeally hot.
During London Fashion Week fashionista Alexa Chung nailed the ‘Winter White’ trend at theJ.W.Anderson A/W 2013 show by teaming a latex J.W.Anderson for Topshop off-white skirt (not available on line yet) with a cream cable knit sweater. By adding contrasting black accessories and a pink pout, Alexa created the perfect cosy/chic ensemble.