https://www.britannica.com/dictionary/skinny
the skinny US, informal
: the true information about someone or something that is not known by most people
- What’s the skinny on their supposed breakup?
- Give me the inside/straight/real skinny.
More example:
“The best wedding website is chock full of information, including details about your venue, the skinny on the local area for out-of-towners, and hotel rooms for those who need accommodations.” – withjoy.com/blog/wedding-website-welcome-messages/