Best definition
wannabe thunder
Someone who seems to never show up on Facebook comment feeds until just after you comment. Usually a woman posting

on an attractive man’s post. It almost seems to be like she waits for your comments just to try to make sure she posts enough to keep the guy’s attention. In large crowds, she tends to try to act like she runs the show, yet nobody really pays her any attention. She’s annoying. She wants to be the thunder. She will never be the thunder. But in her mind she is the thunder.

That wannabe thunder chick is at it again. I can’t say anything on his posts without her following up with something.