Similar to vaguebooking or subtweeting, shadegramming is putting someone down passive aggressively or intentionally throwing shade their way via Instagram.
That girl posted a picture of her with all my friends with the caption: “I know who my REAL friends are.” She was totally shadegramming me.

Dude, if you post that pic of you with her bestie and birthday cake, she’ll know you’re shadegramming her for not remembering your birthday.
by Lewelk December 16, 2019
Get the Shadegramming mug.