"God Bless The Internet"
Used as shorthand when somebody sends you a link or you find something to forward that is gross/cool/weird, and that you never would have known about if it hadn't been posted on the net.
Originated in the second world war and was said by American soldiers to the Italian Army as they retreated. The abbreviation has had a second coming, as Italians visit the world and annoy other nationalities.
Italian: I like the pizza good
Non-Italian: Come on! You've been here 2 years, get the basic grammar right, GBTI!
Italian: So mean to me
Non-Italian: You were allied with the Nazis in WW2
An acronym for Go Back To Africa Nigger. Usage is just entering the mainstream internet culture. Used frequently when insulted by other acronyms such as stfu, this acronym is primarily used in these situations due to it being relatively unknown.
Note: This is not in any way racist as it is most commonly used on people who are not black and is multicultural in its use.