TMI

abbreviation

ˌtē-ˌem-ˈī 

too much information

Avoid offering up TMI. Find out what prompted your kid's query and what she thinks you'll say. Then answer only the question asked.

—used especially to suggest that someone has revealed personal information that would better be kept private

Some of her [Twitter] followers deemed the disclosures inappropriate and chimed in with judgmental, sarcastic responses such as "TMI" and "Yikes."

—Anna Holmes