Where is that from?!?

At some point in the distant past, there was a commercial, or a TV show, or music video, or something, where a guy ends saying “Word to your mother,” and then his mom comes on and says “That’s me. I’m his mother. Word to me.”

I can’t remember where it’s from, and for some reason it’s driving me nuts. The Googles do nothing.

Is this what Generation X senility is going to look like?