Wiktionary
n. 1 A person who bunches. 2 Something that bunches or causes to bunch. 3 # (context manufacturing English) A machine that twists strands together during the manufacture of metal wire; a strander. 4 # (context electronics physics English) A circuit that causes electrons or other charged particles in a particle beam to group together. 5 An illegitimate supplier of laboratory animals who obtains the animals by kidnapping pets or illegally trapping strays. 6 (context military RAF World War 2 English) A ground-based radio transmitter, configured within a system to guide aircraft to their allocated airfields.
Wikipedia
Usage examples of "buncher".
Known in our field as the Brady Buncher, after his deep although not exclusive attachment to that series.
Muster passed over whatever all them places south of Donny were, Newark, Retford, time he flew Leeds-Bradford to Barcelona with a buncher mates for the World Cup game, and what shite that turned out to be.