Two teenagers meet after school

Two teenagers, Fred and Joe, meet after school and Fred is all excited:

“Man I was at the most awesome party this weekend! We went to this dude’s house and guy had toilets made of pure gold!”

“No way!”

“Yes way,” insists Fred, “come with me and check it out for yourself if you don’t believe me.”

Twenty minutes later they’re ringing the doorbell at the place.

A middle-aged lady opens and Fred eagerly asks her,

“Hi! I’m sorry to bother you but there was a party at your house yesterday and my friend doesn’t believe that you have toilet bowls of pure gold!”

The lady looks at him for a moment and then yells into the inside of the house,

“Roger, the pig that shit in your trombone is here!”