The Nunfucker was established in July 1985 in Waterloo, Ontario. Their inaugural practice took place in Bob's garage, featuring Bob on drums, Dave on guitar, Ian on vocals, and Todd also on guitar. After a couple of hours of rehearsal, Todd grew bored and departed, prompting Ian, Bob, and Dave to write and record the "Today is a Good Day" demo using a tape recorder. Notably, at least one track on the demo contained lyrics that referenced the act of engaging with nuns.

In August 1985, Ian's father was transferred to Calgary, leading to Ian's departure from the band. Derek joined as the bassist in the fall of that year, followed by Rob taking over vocal duties. The Nunfuckers began performing at house parties in and around Waterloo before making their live debut at Chuggy's in Hamilton (now known as Hogtown), where they opened for the Vancouver band Resistance.

A few months later, the Nunfuckers recorded the "Into the Pit" demo at CKMS in Waterloo. They created copies of the demo on low-quality blank tapes that had been pilfered from CKMS during the recording session. One copy was handed to the members of Bunchoffuckinggoofs while they were at the White House, a punk hangout in Waterloo. This led to an invitation from BFG for the Nunfuckers to open for them at Lee's Palace in Toronto, where they performed to a packed crowd and received a positive response.

Following this, the Nunfuckers played extensively, sharing the stage with bands such as DOG, MSI, SONS OF ISHMAEL, NO MIND, and the DOUGHBOYS. They even performed with NO MIND in a Chinese restaurant in Kitchener. In 1987, they returned to CKMS to record the "Dead and on the Floor" EP, which featured 11 songs recorded live-to-stereo in just two hours for a budget of $30. A total of 1,000 copies were pressed at World Records in Bowmanville, Ontario. The EP garnered a favorable review in MAXIMUMROCK'N'ROLL #49 and sold out within five months, primarily through mail orders to Germany.

During the summer of 1987, Brian Taylor from YYY/The Record Pedlar invited the Nunfuckers to open for DRI at Ildikos in Toronto. At that show, Rob exchanged a copy of "Dead and on the Floor" with Kurt, who in turn gifted Rob a DRI pin.

Shortly thereafter, Dave left the band to pursue sheep herding in New Zealand, and Jeremy joined as the new rhythm guitarist. Arguably, one of the Nunfuckers' best performances occurred in September 1987, when they opened for SNFU at Ildikos in Toronto alongside PROBLEM CHILDREN. During this show, they played the unreleased track "Rock God," which was inspired by Rob's earlier exchange with Kurt from DRI.

The Nunfuckers ultimately disbanded following a poorly received performance at the University of Guelph in early 1988, where they shared the stage with NO MIND and TWO-FISTED LAW, another Waterloo band.