What is ninja-commenting liking?

When one Comments or Likes a post up to 2 seconds after its posted. (On Facebook.)

WARNING: This action can get very annoying for the person recieving the notifications.

Girl 1: Oh man, I was on Facebook last night, and this guy is TOTALLY ninja-commenting / liking everything I post! SOO annoying.

Girl 2: Oh jees. That sucks...

👍27 👎15

ninja-commenting liking - video