Things I Wish I Didn't Know

Cue teenage daughter entering room after a night out with friends... said child grabs lighter and flicks.

Me: Firebug!
Cady: Hm... it's not a crack lighter.
Me: What?!?!?!
Cady: A crack lighter - it's not a crack lighter.
Me: Explain how you know this "crack lighter" criteria...
Cady: The flame doesn't go way high... it's not a crack lighter.
Me: You can adjust the flame for height
Cady: Just an expression, Mom.

My daughter knows about crack... her vocabulary includes the phrase, "crack lighter." I wish I didn't know this.