In lamens terms means to shut your mouth. Relates to a similar term, shut your face
. Should be used often to annoy others and preferibly with a slight accent. Can be shortened if neccesary to "cha chu" or in emergency to "cha", but only in emergency.
(in Vegas, 7 am) "Dude, you are going to die if you snort anymore blow."
response "CHA CHU MAO!"
Jum'at, 25 Februari 2005