Pick a turn of phrase that needs to be retired due to misuse or one that should be brought back. Such as, "You need to pull yourself up by your boot straps." Misused, this phrase originally meant to be ironic and a reference to completing an impossible or ludicrous task. Pick one and explain yourself.
Not literally going to kill you.
If I hear one more airhead use, or see one more post about someone "literally" doing or wishing something that's clearly incorrect, I'm metaphorically going to kill them.