The tingling burning sensation felt on the anus after doing a large poo! Although felt on the anus, this phenomenon is sensed by the individual as a temperature increase within their cubicle directly proportional to both the girth and gestation period of the poo.
A cross between 2pac the artist and packing heat. It means to Be carrying a gun for yourself and a gun for a friend, hence the name 2pac'kin heat. Tupac Shakur (2pac) used to do this for his close friends.
If the task you are pursuing puts too much pressure on you, then you should not pursue the task. (Especially if the pressure exceeds the benefits of the task.)
My boss saw that I was in panic mode to get my job done today. Instead of words of encouragement, she said to me "If you can't stand the heat, then stay out of the kitchen." ..What a bitch!