1. A real pain in the ass.
2. An object that parents use to inflict pain and fear into their children.
1. Tom: "I hate our 8:00am class!"
John: "Ya waking up that early is such a yardstick...."
2. Mom: "Clean up your room, I'm tired of seeing that mess."
Child: "Then don't look at it!"
Mom: "Thats it I'm getting the yardstick."
Child: "No, no!! I'll clean it up!!!
Mom: "Thats what I thought you said.."