I couldn’t figure out what the igs were all about so (after issuing some advice so I wouldn’t come across as too abrasive) I asked, and the OP said it’s short for “I guess”.
Just curious to know whether everyone else knows it along with LOL and ISTM and NFSW and so on, and I just haven’t been paying attention, or if most other folks would be ignorant of this ignoble ignominious rendering.
I wish folks would capitalize their initialisms. That’s how you traditionally signal that each letter stands for a separate word, not a syllable or that you just left off the back 80% of the word.