IG means I Guess.
The Full Answer
IG is a slang abbreviation that stands for I Guess.
It is used when you want to say that you suppose or think something…
or to agree with or say yes to someone when you are not certain…
or not very enthusiastic.
IG is also a slang abbreviation for Instagram, which is its other widely used meaning.
Where Would You See IG?
In texting… and chat… and on social media, such as Instagram… and Twitter… and Facebook… and messaging apps, such as Kik… and Snapchat.
Yeah, ig bae must be asleep, he’s not replying to my messages.
So ig i’d better get a new phone.
I thought my surprise lunch was going to be the swanky new restaurant in town, but ig not.
Other IG Meanings