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.
Natalie Portman made a serious fashuuuun statement whilst promoting her feature directorial debut, ‘A Tale of Love and Darkness,’ in Cannes last week. Wearing a dare-to-bare Rodarte dress from their Fall 2015 to her photo call, no one’s eyes could be diverted. With intricate beading, floral sequins, a feather trimmed bodice and a see-through skirt, this was certainly a cheekier and more risqué look than we are used to seeing the actress wear. HAWT!!