I'm pretty sure that's a vibration sound effect.
No it's not the *Menacing* Jojo reference. Though the purple text reminds me of it.

For some reason, many say that everything is a reference to Jojo. Not everything in life is reference to Jojo people.

Moonlight-ga said:
For some reason, many say that everything is a reference to Jojo. Not everything in life is reference to Jojo people.

Wait... is your comment... a mudarfucking JoJo reference?!

you thought it was a JoJo reference! but it was me, vibrator !

to be fair, the jojo menacing symbol when used in succession like this translates to "gorogorogorogorogoro" which is used to convey a muffled rumbling or shaking sound

much like a vibrator lodged in a soft hole