Xiao Kucha means underpants on the Internet, which is generally used to describe people who can't walk when they see handsome guys and beautiful women. The general usage is to wear bitter tea, and you can't make bitter tea in the comment area, which is the extended meaning of "wearing clothes".

source

The stem of bitter tea comes from the comment area of some videos, which are generally handsome and beautiful, and then sexy in style. Bitter tea is the special language of lsp, which is the homonym of underpants. Because the original word is easy to be harmonious, it is replaced with this one.

Usage example

Wear a bitter tea!