Badmouth was a science fiction fanzine by Lynn Hickman.
Badmouth was published in Wauseon, Ohio, U.S.A. in the 1970s. The first issue appeared in Spring 1970. Issue 2 was released in Summer 1970, and issue 3 in Summer 1971.
Contributors of writing included Liz Fishman, Lisa Tuttle (Mathom), and Gary Zachrich, among others.
Contributors of art work included Irene Beck, Jay Kinney, and William Rotsler, among others.
Lynn Hickman , with Carole Hickman, had released TLMA in the 1950s. Lynn also published The Little Corpuscle, a companion zine to TLMA. Later in the 1950s, he published JD Argassy until the 1960s, and then Badmouth, followed by The Pulp Era in the 1980s and 1990s.