1. A sexual maneuver in which the male exhausts warm air on his thumb, heating it, and placing it in his partners vagina, giving warm comforting pleasure.
2. Slang: used when explaining if you had a sexual encounter and/or if it was humiliating.
1. "When Janet met Maximus she thought he was nice. When Maximus gave Janet the Hot Thumb she fell in love"
2. " 'What happened to you at the party last night?'
'I hooked up with that foreign girl!'
'Dude you've been working that for weeks, are you gonna call her?'
'Fuck no! I Hot Thumbed that shit!' "