中文解释：

　　guitar face是指弹吉他时候的面部表情，通常是比较陶醉，甚至是有感觉痛苦的表情。

　　英文解释：

　　The act of making an unusual face while playing the guitar. The look typically resembles a look of pain, intense ecstacy, or sometimes even plain old gas.

　　例句：

　　John  has some crazy guitar face.

　　约翰弹吉他时候表情很陶醉。

　　Bill looked at John's guitar face just now.

　　比尔刚才看了下约翰弹吉他时候陶醉的表情。