Deck the halls with boughs of holly, and so much background noise that you can't hear yourself think, nor anyone else speak.
You resign yourself to lip-reading through the drunken haze, only to discover that it's the same deaf joke that you've been politely laughing at since you were a child. Your uncle apparently believes it's the height of hilarity, and a highly original jape.
"Deaf, eh? Eh?" Pantomime cupping of the ear. "What's that you said? Eh? Eh?"
Your mother is grimacing at the potential awkwardness, so you smile and have another sherry, while glancing at the Christmas tree where a subtle message hangs like sanity. Angry Deaf is quietly here and has your back.