Someone who is so stunning that it almost hurts to look at their beauty. The spelling comes from the english hot and the idea that the more t's added the hotter the subject is. See also hot;hott;hottt
No doubt after someone sees this there will be the new and even higher level of hotness; hottttt
Jake-Did you see Ry? She was hotttt!
Other dude- Yeah it felt like looking at the sun at noon but in a good way.
Extremely pretty, wonderful, and amazing.
Bonnie is so great, she's hotttt.