OMFG WTF STFU GTFO N00B is the largest possible insult able to be used against old people who don't follow
abbreviations in such a manner.
Standing for
Oh my fucking god, shut the fuck up, get the fuck out n00b.
People over the age of thirty are
baffled to what this even means when said like so.
Kid: Mother, can you make me
pancakes for breakfast?
Mother: No, i'm already making you
toast
Kid: OMFG WTF STFU GTFO N00B
Mother: ???