When you are doing an action that is very fast coordinated and has an overall good impression.
"Dam man ,look at that guy on the dance floor!Shit guy,he's blazing"
by Phoenix March 11, 2003
hot to the point of absurdity (im not sure that is a word)
That guy is blazing!
by shooter August 03, 2005
Usually weight training, but also any other strenuous activity.
by bigdave December 30, 2003