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.
Ooh La Lexa… This week Alexa Chung left a muddy Glastonbury for a beautiful Paris to attend the Chanel Haute Couture Autumn/Winter’13 show at the Grand Palais. The presenter/DJ looked très chic in a midnight blue velvet mini-dress with black lace Victoriana style high neckline and delicate sleeves. Black and navy is my favourite colour combination, one Alexa regularly wears on the front row, this time completing her stylish look with a small classic Chanelshoulder bag and a pair of triple buckled black Mary-Janes (which would look hideously unflattering and terribly un-HAWT on anyone else aside from Alexa!)