Up My Heat 

means getting a newer or better firearm than the one you have currently.

you know I had to up my heat man.

yeah that choppa aint shit.

Up My Heat by Airsoft_hawk September 11, 2018

Feeling the heat go up my body

A figure of speech to signify how someone feels when they're nervous, anxious, worried, afraid, ashamed, or even shy.
This is typically an unpleasant feeling, because you will see something that hurts you, worries you, or scares you.

I am feeling the heat go up my body whenever I see a picture of that girl, because I miss her terribly, but I know at the same time that she doesn't want me, so I will never get the chance to be with her.

Feeling the heat go up my body by Lueriva Fetheroviu June 26, 2023