There is an episode where Archie meets George Jefferson's mother and asks if she is his ****y (note: the term is an offensive term so I have bleeped it. It starts with "m.") Then Jefferson's mother started going off on him. What episode is this?

That was the episode "Lionel's Engagement" where the Jeffersons give a party for Lionel and Jenny on their engagement. That was a really funny exchange between Archie and Mother Jefferson.