The gaming abbreviation of Jeff Goldblum, typed or yelled when you are in danger and need to be saved.

Like that time in Jurassic Park when Jeff Goldblum saved that dude by waving a flare around to distract the T-Rex.

JG, otherwise known as Juicy Gossip. Used to describe gossip that is particularly succulent, often concerning specific individuals.

Jealous Girl. A girl who is only a friend of a guy, yet is totally jealous of any attention he gets from other women.

refering to a Jungle Gym - an extremely sexy tall man

Another Name For J GROUP Witch Is A Group On MCPE Anarchy Servers

To take load off the way too used abb. LOL, JG will work for the normal smile, so LOL can be used for its real purpose, being the times you actually laugh out loud. JG then meaning Just Grinning.

The verb of Jew. To be cheap.
Noun version, JG abbreviation for Jewgen aka Jew.