"Edgy" as Marcelo has pointed out means "nervoso" or "irritável". That is, to the original question brought up by Daniel. And if he really meant what I think he meant.
"Nervoso" in the second sense Daniel wanted (the one related to cars), could be "wicked":
"o carro do zequinha tá nervoso(top, chique, massa etc) depois que ele colocou aquele aro 18".
Nice ride/whip that of Zequinha, after he put on those new 18" (rim) wheels! OR
Those news 18" (rim) wheels looks sick on Zequinha´s car, ain´t it? (here "sick" is said in an approvingly fashion).