Similar to what we humans know as a yacht. However there are certain individuals who have difficulties pronouncing this word- hence yach
Joe: Fuck u man! im gonna get a yacht and name it YACH.. Cant say im wrong now!
by -.-andie September 29, 2011
Short for be-yach or bitch
I aint goin out like that yach.
by Craig S. Andersen October 15, 2003