Gustavo is a term coined by Natalia Sherlyx Coca Christmas, a Gustavo is anything with 2 eyes, a nose, and a mouth. Gustavo can also be a name, but that's irrelavent for now.
She coined the term when she went arount looking for Gustavo, she asked us if we knew where he was, we asked "What's a Gustavo?" and she said "They have 2 eyes, a nose, and a mouth" then we said "So a Gustavo is anything with 2 eyes, a nose, and a mouth", she got annoyied and left, and the term was coined.