Wedgie In My Booty is a meme created by MomoNiu. It is an iconic meme that has been recreated numerous times by animators in the community.
The meme usually starts out with the OC twerking in the camera (at the "Jiggle jiggle pop" lyric), and then doing squats. Then they swing their arms and do a small "finger dance" (At the "Weave in tight."). Afterward, they do karate movements. They are then usually pictured wearing sunglasses whilst an explosion takes place in the background.
Depending on how long the meme is, it may involve the character being spanked in the last scene.