This song is about a venereal disease - "The Jack" is Australian slang for Gonorrhea, which is also known as "The Clap." AC/DC lead singer Bon Scott explained the origin of the song in a 1976 interview with Sounds. Said Scott: "We were living with this houseful of ladies who were all very friendly and everyone in the band had got the jack. So we wrote this song and the first time we did it on stage they were all in the front row with no idea what was goin' to happen."
Защо никой не каза че по този начин се популяризира песента?Лоша реклама няма. Още няколко милиона хора имат възможност да чуят една от най-добрите песни на планетата. Аз български песни съм чувал поне в 10-тина филма и това само ме е радвало. (bg)