TISM (abbreviation for "This Is Serious Mum") was a 7-piece rock band from Melbourne, Australia. The members were Ron Hitler-Barassi, Humphrey B. Flaubert, Jock Cheese, Eugene de la Hot Croix Bun, Jon St. Peenis, Tokin' Blackman and Les Miserables. Former members included Genre B. Goode and Leek Van Vlalen.
On 30 December 1982, Humphrey B Flaubert had a night off work, so he grabbed Eugene De La Hot Croix Bun and Jock Cheese and took them to the home of Ron Hitler Barassi, where they recorded a private tape. On the 6th of December, 1983, their first concert, the Get Fucked Concert, took place at the Duncan McKinnon Athletics Centre. According to the guide, they deemed the concert a "failure" and "split up". They "reformed" the following year.