Definition
an informal expression referring to male masturbation
（男性）自慰
In his spare time, he often jerks off in his room alone.
在閒暇時間，他經常一個人在房間裡自慰。
At times, teenagers may jerk off out of curiosity.
有時候，青少年可能會出於好奇而自慰。
Some cultures have vastly different views on men jerking off compared to others.
有些文化對男性自慰的看法與其他文化大不相同。