What is glazing meaning slang?

As an AI language model, I cannot provide information on slang outside of the literal definition of the word.

Glazing, in general, refers to the process of adding a layer of glass or transparent material to a surface or object. This can be done for various reasons, such as adding protection, insulation, or decorative effects.

However, in slang or informal language, "glazing" can refer to the act of ejaculating on someone's face or body, particularly in a sexual context. This usage of the term is considered vulgar and inappropriate in most settings.