Buff is also a soft cloth used to rub a surface until it looks bright and shiny.

VOA: special.2009.05.17

It is tight, buff, a lean, mean fighting machine.

它紧凑，淡黄色，倾斜，叫做战斗机器。

麻省理工公开课 - 固态化学导论课程节选

So if you learn how to look at films and if you are a real film buff, even bad movies will be useful, because they will give you things to develop your sensitivity toward the nature of film itself.

所以如果你们可以学会如何看电影,如果你们真的对电影了如指掌，即使是不好的电影也会很有用，因为,它会培养你对,电影本质的敏感程度。

麻省理工公开课 - 电影哲学课程节选

In time, any man who rushed to fight a fire became known as a fire buff because of the buffalo coat he wore.

VOA: special.2009.05.17

The meaning of buff that we do know about is one that describes a person.

VOA: special.2009.05.17

Someone who is deeply interested in the American Civil War is a Civil War buff.

VOA: special.2009.05.17

A buff is someone who has a strong, special interest in something.

VOA: special.2009.05.17

For example, someone who loves jazz music is a jazz buff.

VOA: special.2009.05.17

The word buff has several meanings.

VOA: special.2009.05.17

but I did get kind of fit for the film because every cheese farmer is ripped and buff and I wanted to be true to character because I'm 'method' ."

VOA: standard.2010.04.30