verb. To mumble incomprehensible, similar-sounding phonetics over song lyrics someone isn't sure about.
This is done as a
lame attempt to cover up for the fact that someone really doesn't know the
words, when the more appropriate action would have been to just shut the fuck up. It is your moral obligation to bust this person out, to preempt future singing
fail.
Bob (singing): When the light's out, it's less dangerous! Here we are now, In containers!
John:
Dude, did you just Yellow Ledbetter all over
Kurt Cobain?! Spare me your song-desecration, Lamesauce!