A holo taco is... well. Hm.
Lemme explain holo first.
Holo is short for holographic, which is something shiny that can come in any colour or form, that when light is reflected off it, it shines rainbow MAGIC SHIT!
Or for the idiots:
Holo: holographic glitter
Taco: a simply nailogical (Cristine with no ‘h’) abbreviation for top coat.
Or, holo taco could mean simply’s new nail polish line! It’s beautiful cristine I own one
While ordering your regular five crunchy tacos on Taco Tuesday you realize you're craving a soft taco so you pick up the fattest chick in the room take her home with a hard taco in her twat and before you go to eat her out snatch up some of the sauce left under her tits and put it on your appetizer before she gets ate, the soft taco awaits you inside her vagina.