It's A Lovely Property On Elm Street

Mum: Open a Word document, I need to make a list of things I need for redoing this room.
Me: Okay, shoot.
Mum: Okay, put number one, switchblade--
Me: --WHAT?
Mum: --WAIT, I DIDN'T MEAN THAT, STOP, OH NO--
Me: ...Freudian slip or what, mother?
Mum: Cover. Switch cover.
Me: Uh huh.