Steering Wheel

The act of being the third wheel of a couple, but you're the one driving - basically acting as their chauffeur or designated driver.

Hey man, I gotta go. I promised I would take my buddy and his girl to the airport.

Ight, that's all good.

Nah dude, my buddy's cool - but I hate being there with his girlfriend. It's like she hasn't grasped the concept of not interrupting every word out of our mouths. I hate being their steering wheel.