four-wheeler（美国俚语）[汽车司机用语]汽车；四轮车。

【例句】
Presently she came to a halt, and hailed a four-wheeler which was passing.
她突然停下脚步，叫住了一辆过路的汽车。

She would not only and only sit the four-wheeler wagon, and still can make some another affairs.
她不仅只会坐四轮马车，而且还能做一些别的事情。