sultrasonic 

explosively sultry or sensual; suggestive in choice situations.
can be applied to actions or nouns.

wow, that backrub was sultrasonic.

i'm loving this sultrasonic conversation!

you're looking mighty sultrasonic today.

sultrasonic by Abber Dabbs March 30, 2010

ultrasonic 

A word used to describe your girlfriends voice when she's pissed at you. Calling her this will not make her less pissed.

Your voice went ultrasonic again

ultrasonic by Friend of uours March 29, 2015