a very personal technique I was taught bc I was always a smaller kid, was the bear hug of a larger opponent.
Let them grab u by the waste, try to place one foot in the crook of their hip for leverage. What's a couple of ribs, its better than your face, right?
Using a combination of neck strikes on S9 & TW17 simultaneously w/ opposite downward elbow strikes on the temple.
Big guys fall, if ur not afraid of the bear hug.
Gotta use big guys egos against them.
I also love power lift sue flexing.
If u are wearing a belt, that's an anchor, latch on and sue flex.
Now I realize everyone is going to be like uh uh not me.
Well have U ever successfully implement a wrist grab, where all u use it a thumb and index finger to control your opponent?
Doubt it.
Upper cuts to kidneys and spleen are also recommended.
Bring diapers, guys tend to piss & shit themselves.

$5K advanced ju jitsu & tae kwondo by Sensi Kwan, 3rd from Bruce Lee.