A female, usually a whackjob with low self-esteem, that can't refrain from posting photos of her goofy kid on Instagram. Photos are usually painfully mundane, but held in high regard by the Instamom.
"Did you see all the lame pics that Nancy posted on Instagram of her kid brushing his teeth? She is the worst Instamom ever. Get me off this planet."
by India Najones March 11, 2020