drifter

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Afterwards, he was a foul-mouthed drunkard, a drifter and a failure.
但是事故发生后就变成了一个满口污言秽语的酒鬼、一个流浪汉、一个失败的人。
As a young man, after a Cambridge education, he stumbled into a career as a drifter, a collector of butterflies and author of strange books.
在剑桥接受教育后，他一个年青人，却茫然地开始了一个流浪汉的生涯，后来成了蝴蝶的收藏家和一些奇怪的书的作者。
But the squid's titanic reputation is slowly being deflated, thanks in part to a new study that says the creature is no more than a sluggish, gelatinous drifter.
但乌贼的盛名正被慢慢地削弱，部分地归结于最新的一项研究，研究表明它只不过是个行动缓慢、呈凝胶状的浮游生物。

Potts cooks breakfast for a young drifter named Hal (Sebastian Stan), who is noticed by Madge.
NEWYORKER: Heartland
That drifter sensibility gives Dondero a certain perspective on the people he encounters and the places he passes through.
NPR: Dondero's CD Takes Fans 'South of the South'
Is a star as solid as he is really the right choice to play a ghostly drifter of no fixed abode?
NEWYORKER: Violent Screen

(person) someone who does not have a permanent home or job and moves from one place to another or from one job to another

If you describe someone as a drifter, you mean that they do not stay in one place or in one job for very long.