The polite
way of telling someone they're a dumb
ass without letting them know you're thinking they have recently acted or spoke without using
even an nth of thought/brain activity.
Act: Your best friend insistently waving at
your mom as you drive past her in the Walmart parking lot while skipping school.
BFF: Look! It's
your mom. (Waving and yelling, "
Hey Mrs. Connor")
You: Yeah but we are supposed to be in gym class right now, Silly!