suck

v. 啜,吸,吸入,吮吸
<俚>糟糕, 太烂了

Don't suck your thumb; it's so dirty.

别舔手指头，太脏了。

I don't want to get sucked into the row about school reform.

我不愿意牵扯到这场学制改革的争论之中。