Badmouth was a science fiction fanzine by Lynn Hickman.
Badmouth was published in the 1970s.
Contributors of writing included Liz Fishman, and Lisa Tuttle (Mathom), among others.
Contributors of art work included 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.