a dead beat
寄生虫
A: Have you ever run into a person who tries to bleed you white?
A: 你有没有遇见要把你榨干的这样一个人?
B: I'm always on the look out for such girls.
B: 我一直在警惕这种女孩子。
A: I hear that some guys splash all their money about on them.
A: 我听说有些人把钱都花在她们身上了。
B: Mark is one of them. He has trouble with a girl who turned out to be a dead beat.
B:马克就是其中的一个。他感到一个女孩竟然是赖账的人。