It can mean a number of things:
1. Proceeding to hit someone and then hitting the wall behind them instead
2. Falling over a small step really slowly no less than a few inches
3. Being annoying for the sake of being annoying.
1. Person 1: My hand hurts
Person 2: Ha! you did a francy
2. Man you should have seen it jeff did a francy at lunch today
3. steven stop being a francy.