New Expressions

OK, now here’s a question:

Is it a bad thing to teach one’s American colleagues the following expressions, and then see them in use in emails that’re heading further up the command chain in the company?

1. Turd Polishing
2. ClusterFuck Fairy (as in “I see we’ve been visited again by the ClusterFuck Fairy”)

and

3. “Couldn’t find his arse with both hands and a flashlight”