This phrase is often employed when one accidentally touches someone inappropriately, say while brushing against a coworkers bosom while squeezing past in a crowded elevator, and is used to convey that the inappropriate touch was unintentional.
One should take care that this phrase is not mistaken for "No, Cuomo," which roughly translates to "
Please pardon my predatory and inappropriate behavior, for I am of Italian descent and
don't know any
better."
"I meant to reach for the cellphone in my back
pocket but accidentally touched Jim's crotch, so I
said 'no
cuomo' to let him know it was an accident."