What is squid guard?
The squid guard is a great way to tie your partner up, break their posture down and make their position weak while you still have free limbs to attack, similar to a squid attacking its prey. Squid guard is a specific type of lapel guard, alongside its cousin worm guard.
Here's a simple breakdown of how to get into squid guard.
Here's a video that shows the control you can establish, and how you can hold the person in place by encircling their leg (between your arm and their lapel). You tend to stay attached to them with the foot-hip connection as well, since your foot is encircled by the same lapel that traps their foot.
Here's one easy technique you can sometimes hit from squid guard.