When someone has the tag of their shirt ect. showing over the collar of it, they are referred to as a tag dag. The actual tag as referred to as a taggy daggy. If you see some one with a taggy daggy, it is entirely appropriate to stick your hand downthe back of their shirt to to fix it.
A small twisted piece of toilet paper, usually discovered hours later on the bathroom floor, that has obviously been used and should have been flushed, but wasn't.