1 flop into, onto sth;flop (down/back) to sit or lie down in a sudden and careless way because you are very tired （因累而）突然随便坐下或躺下: I was so tired that all I could do was flop onto the sofa and watch TV. 我累得只能够倒在沙发上看电视。

2 flop around, back, down, etc to move, hang or fall in a careless way without control 松散地移动、垂下或落下: I can't bear my hair flopping in my eyes. 我不喜欢让头发垂到眼前。

3 (used about a book, film, record, etc) to be a complete failure with the public （指书、电影、唱片等）完全不受公众欢迎，不畅销，不卖座