Mrs. Brown is Agnes Brown, the outspoken matriarch played by Brendan O'Carroll in the BBC comedy Mrs. Brown's Boys, which became a mainstream television hit in the 2010s after starting as a stage and radio act. Her laugh, like the character herself, is broad, bawdy and instantly recognisable, which helped short clips travel beyond the show into memes, reaction videos and social edits. It endures because it sounds like a real person enjoying a joke, not a polished sound effect, and it sits naturally alongside other famous laughs such as the Woody Woodpecker laugh.