stompbox
Noun
Meaning
A simple percussion instrument consisting of a small wooden box placed under the foot, which is tapped or stamped on rhythmically to produce a sound similar to that of a bass drum.
(music) A guitar effect unit which can be controlled with the foot
Source: en.wiktionary.orgSynonyms
Examples
Effects units come in several formats, the most common of which are the stompbox "pedal" and the rackmount unit.
The electronic transistor finally made it possible to cram the aural creativity of the recording studio into small, highly portable stompbox units.
The stompbox that simulates this effect is the Uni-Vibe pedal.