To me, it reads as a signal that the speaker is an insider, part of the clique.

One of my fav local prints

Going for this one next:

Thank you. It totally does. But hey, at least I finally reached the pinnacle of human achievement: becoming a Harebrained t-shirt!

Omg I literally became this at 11:30 a.m. today!

We saw so many harebrained shirts today! #stfuaboutchicago