He settled in sullenly at the kitchen table, his smile morose, and suddenly he would call out, "Pull my finger!" If you did he let out a tremendous burp.
A variation on this joke appears in Yasujiro Ozu's film Good Morning (1959). Schoolboys ask each other to push their foreheads, responding with an expulsion of gas.
In 2008, an iPhone app from Air-O-Matic called Pull My Finger was one of the most popular apps in Apple's App Store, purchased over 50,000 times in less than one week. It allowed users to pull a virtual finger, activating the sound. The phrase is now the focus of a legal battle between Pull My Finger and InfoMedia's iFart Mobile app over the use of the phrase.
In 2015, an MRI study of how knuckles trigger popping sounds were jokingly called the "pull my finger study."