What does “Day One” mean?

What does “Day One” mean? and What is a “Glizzy”?

The term and slang “Day One” is a noun, which is used to reference someone you’ve known for a very long, since the begging and have experienced difficult times with.

Day One is someone you’ve known since the beginning.

Day Ones are people you’ve known since the beginning.

The term “Day One(s)” has been used by Drake, Nas, Lil Wayne, YNW Melly, Meek Mill, Chance the Rapper, Post Malone, Skepta, and many more rappers.

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