Known as glossy top coat. When a clear like liquid also known as nail polish is placed on top of a nail design. Simplynailogical also known as Cristine made this up while covering the holo polish with a glossy taco (top coat)
"Now it's time to add a glossy taco"
"Cristine saw that Jen was using matte top coat, and snatched it and gave Jen the holy glossy taco"