"What was that last part?"
I'm pretty done with the "what was that last part?" gag.
Example:
"I've tried everything! Sleeping, exercising, farting on you while you sleep, better diet!"
"What was that last part?"
"Better diet? Oh well I've been trying this new.."
"No, before that"
Pretty sure I've seen that exact dialogue in three different shows/movies within a week