What exactyl means ->

vocal cut in Sample Edit?

Just checked it:::
I sampled some stuff from WeFunk Radio and tried the function... Sounds like most of the bass and some of the mids spectrum get's cut, so only a thin voice remains... might work for inserting voice samples to beats.. and then you can use the q-link fader type jugga-juggas on it

Its a technique used to cut a vocal from a sample, waveform of the left channel is subtracted from the right channel, so everything thats completely centered in the stereo signal will disappear (bass and vocals in most cases).