1.To be headed in the Western direction of any Southern Hemisphere such as New Orleans to Hoston, Houston to Cali, Atlanta to New Orleans,etc...
2.To leave any area in a expeditious or speedy manner.
"Where are you dogg? I on my way to Houston headed 90 gone west."
"When that boy saw all those thugs coming, he was out of the building faster than 90 gone west."