No idea y got this n image search for "im hot sign" but its absurd and stupid..so similar in ideology if not semiology.  I mean, really? yea, youre a spoiled, incredibly overpaid..did I mention spoiled?..

There should be an acknowledged international sign language sign for "hot"..the spitting on finger then touching your ass thing for "im hot" doesnt work for men at all.  Unless they're REALLY effemminate.  And it doesn't really work for "you're hot" if you point at that girl then go through the motions.
She'll just think you're saying "Hey Girl, Im super-gay!"
Which, by the way, is COMPLETELY the opposite of what you'd have been trying to communicate.
I'm taking suggestions.  So far we have :
-sticking finger in mouth, then taking out, shaking, and bringing in front of eyes and making a 'surprised face' (thus acting out 'Its you giving me a fever' or 'yure hot like a fever')
-sticking out the foot, touching toe to ground, then acting as if toe has been burned  (thus saying 'Im walking on lava' or 'you're making me walk on lava'?  id walk on lava for you?..hard to see the thought behind that submission)
So, LOTS of help URGENTLY NEEDED!
ps-this is because there are a couple of really superhot girls I see when Im running every day and they are driving their cars wherever.