One who is acting to impress others in a situation where the result could be (most typically) arrest. One who is acting in a flagrantly belligerent or, in some cases, dangerous way; can also be 'hot moves'
"I can't believe that hotass is taking a bong hit in front of those cops!" or "Rick got the nickname of Hot Moves because of all the hotass things he has done."
by Anthony Forrester May 23, 2007