glossy taco

Word created by a 'nail art' youtuber.

Basically, it's clear nail polish that you put on after, to make the other colored polish last longer.

Glossy topcoat apparently sounded like 'glossy taco' so she started calling it that.

Cristine(YouTuber; Simplynailogical): "Now put on a glossy taco after the other nail polish dries."