Nerf This!

"Nerf This!" is a twerking video by ChelHellbunny. It (and a vocoded version of it) became a recurring meme on the SiIvaGunner channel in late August 2019.

History
The video was uploaded July 23, 2016 to ChelHellbunny's YouTube channel (although she has since removed all her videos); however, it's a remake of a video she posted to Twitter 3 days prior. Both videos show ChelHellbunny cosplaying as the character D.Va from . She says "Nerf this!" (D.Va's catchphrase), slaps her buttocks, and then twerks.

Later, a fart noise (originating from another video) was added by another party, possibly the channel Astro Boy, which has the earliest known upload of the fart edit. This edited video became a minor meme in certain communities afterward.

The reason why the meme has been picked up by SiIvaGunner is currently unknown, but the first four rips with the meme actually reference a vocoded edit which may be meaningful. These first few rips were met with an overwhelmingly negative reception, likely causing more rippers to include the "Nerf This!" meme in rips.

Rips
A prototypical rip using this meme goes like this: Play bit of the advertised track, then insert the audio for the phrase "Nerf this!" (either ChelhellBunny's or D.Va's), and finally, end with the fart noise. Several rips like this were published in August and September 2019. Later rips tend to be more creative.

Notably, the vocoded version makes the fart sound somewhat similar to the first notes of "Giant Steps"; the five-note phrases have similar melodic contours, and the phrases both start by descending and then ascend only from the fourth note to the fifth note.