Humour and jokes about one's mother-in-law are a mainstay of comedy. The humour is based on the premise that the average mother-in-law often considers her son-in-law to be unsuitable for her daughter, and usually includes the stereotype that mothers-in-law are generally rude, overbearing, obnoxious, and/or unattractive.

Leslie Dawson was an English comedian, actor, writer, presenter, and pianist. He was known for his deadpan style, curmudgeonly persona, musical routines, and jokes about his mother-in-law and wife.