1 Sanic is eqilent to the speed of light (299 792 458m/s) and it´s inspired by Sonic the Hedgehog. It´s often used by respectable scientists and was first introduced by Albert Einstein.
It´s also not very rare to hear it as an adjective to something that REALLY fast.
Sanic usually refers to ear rape or other forms of extremely loud spam. Derives from the YouTube video "HOW 2 DRAW SANIC HEGEHOG" in which the uploader draws an extremely mediocre Sonic the Hedgehog while a messed up version of music from the Green Hill Zone stage.
Spinoffs include "HOW 2 DRAW MAREO BROTER", "HOW 2 DRAW: HOMRE SIMSON", and "HOW 2 DRAW LEFEND ZEDLA"
When a moment or memory that is fantastic, requires a better word than funny; but you don't want to sound dumb by continuously adding so's in front of it. (you know you've been in this situation before)