A "gogoplata" is a technique in Brazilian Jiu-Jiujitsu where your shin is forced against the front of your opponent's neck while you pull their head into the shin. The name comes from the word "gogo" in Portuguese, referring to the throat or Adam's apple. The "-plata" suffix is just a riff on the term "omoplata", and can be interpreted as an informal slang in BJJ for a lock or submission.