前几天看南方公园说了打手枪这个词，太快没听清楚，貌似是bit out之类的，哪位大侠能指点一下？
查了一下原剧本，应该是beat off
Cartman: [sighs] Dumbass, you can only milk a dog once every few hours. It doesn't work if you beat off the dog again right away.
Kyle: You "beat off?"
感谢各位的耐心解答，hand job也很常用，所以决定采用wallyy兄的答案，