I'll let you ponder over that one
You throw this phrase out like a smoke bomb when you know you said something dumb, and you hope no one remembers it.
'I'll let you ponder over that one' after I told my crush I was a vampire hunter.
'I'll let you ponder over that one' when I said my cat was the president of France.
'I'll let you ponder over that one' after I told my mom I was a time traveler.