Linguistical Limbo.

Or should that be lexicographical limbo? Meh, whatever.
Seen on a signpost outside a beauty salon:

"Semi-permanent eyelash extensions."

...

So that'll be temporary eyelash extensions then, yeah?

I'm sorry women, but that one was so bad you're all going to have to line up for a slap. One at a time, keep the line moving, come on.
*whap*