Some guys were showing off their burnouts in the parking lot, drawing a crowd.

burnouts 是名词 burnout 的复数形式，由动词短语 burn out（烧尽、耗尽）合并构成的名词。在汽车文化中特指"烧胎"表演，即让轮胎高速空转产生烟雾的炫技行为。