Kickin' it old school in the Jiu Jitsu world means that you've just started learning your spiral guard to the back. That shit is as old as full guard nowadays.
With the speed of learning and innovation in sport BJJ, techniques come, go and evolve very quickly. Some submissions even fall by the wayside and get lost in the blackhole of techniques - for example, the shin lock. The shin lock is a staple of Catch Wrestling that was often used to attack your opponents legs when he was attempting to take or was already on your back. Currently, very few grapplers have even heard of the shin lock let alone think it's effective, but take a look at this updated approach to the very old and very painful shin lock brought to us by the old school guys at Lockflow.