Adjective. A young women who is known for her charming humor, large bosom and flakiness. Many times the phrase Nico G can describe a person you are annoyed with for being impossible to reach, but it can also be used in a positive context to describe a charming and smart young woman. Nico G can also be used in place of 'haus'.
"Why didn't you call me? God, you are such a Nico G"
"Wow, she is almost a goddess, what a Nico G."
"She clapped sooooo loudly during the show, what a Nico G"