IDIOMS

spill the tea

(idiomatic, informal) To disclose information, especially of a sensitive nature.

Example: 2012, Demetria L. Lucas, "Should I Worry That He Earns Less Money?", CARE, Issue #18, October 2012, page 18:
  They are up in your business because you invited them in by spilling the tea on what you and your man earn.
2013, Stanley Bennett Clay, "A Fun Quick Read", DBQ Magazine, Volume 3, Issue 1, January/February 2013, page 9:
  […] she makes good on her promise to out her celebrity husband in the media by going on the top nationally syndicated radio talk show of Neicy Ross, an even more tacky version of Wendy Williams, and spills the tea on her man in delicious detail, […]
2013, "The Ones To Watch", Brink Magazine, Issue 26, February/March 2013, page 17:
  Four different entrepreneurs and talents spill the tea on success, failure and lessons learned.
For more examples of usage of this term, see Citations:spill the tea.