Cursing at work.....
My boss asked me to complete a task and I turned and said "You know about as much about it as I do."
Not a good career move. As soon as the words left my mouth I know I f'd up so I quickly followed up with "So can I ask you a question if I hit a roadblock?"
He started laughing his *** off. "Nice save!" he told me, but don't ever do that again.
Another stellar career moment in my life, lol!