The feeling you get when you know you did something that you're not supposed to, causing a wave of heat to pass through you.
When the teacher asked about who put gum on the board, I had a major heat-eek.
friend 1: hey its really hot today.
Friend 2: yeah, it's because of the heatness.
Heatness is a plural of heat expressing the amount of heat excreted by something such as an object or living thing.
"Wtf is heatness?" - My Earth Science Teacher
A glass (bubble-ed ended) pipe used to smoke crystal methamphetamine
Honey? Have you seen my Heat Stick? I gotta' go to work, it's almost 9am!
When black people sweat on their forehead
Oh shit, Jerome has some dank harlem heat going on right now
A group chat to prepare for a main event or activity
me and my mates jumped on a heat chat - oh man, we're gonna feel the burn