A sound effect that usually get uttered when themental scale of the group ranges anywhere from 1-3 on a scale of 10; or is uttered when there is nothing else to say.
Friend 1: I'll just drive her out to "get luckyrock" then once we're out there I'll just say I'm out of gas and that we'll have to stay the night out there
Friend 2: I don't know man thats about an 8.5 on my schemometer
Friend 1: What?
Friend 2: Obviously you schemed about that plan for a while, you're a creep