An individual who puts themselves at a higher stature than they are able to maintain.
The term originated from the Second Chance Theater sketch, "Griff Banks the Sensitive Bully" in which the Andy Samberg character reefers to himself as a gaping snorf.
I have just used generic female names for the purpose of this example.
Gabby: oh man dude you look so good i could almost snorf YA (;;;
Jasmine: dang dude thanx. no homo?
Gabby: It's 2018 jasmine. pro homo Jasmine: bro
Gabby: bro