Teodoro "Teddy" Acevedo Casiño (Tagalog pronunciation: [kaˈsɪɲo], born November 15, 1968) is a Filipino activist, writer, and journalist.

[1] On December 4, 2024, Casiño and 74 others filed the second impeachment complaint against Vice President Sara Duterte, citing betrayal of public trust for her office's alleged misuse of confidential funds.

[2][3] Born in Davao City to middle-class parents, Casiño finished elementary education at De La Salle University (DLSU) in 1982.

The EDSA experience, plus the stories about hunger in Negros, moved him to forego a DLSU scholarship to study agriculture at the University of the Philippines Los Baños (UPLB), where he became an activist in his freshman year.

He eventually graduated from UPLB with a degree in BA Sociology in 1993, with his thesis bringing him to Pamplona town in Cagayan Valley, where he studied the impact of Church activism on rural communities.

[15] Casiño's main advocacy is the lowering of prices of electricity, oil, and water, as well as the regulation of the cost of education, healthcare, mobile communications, toll fees, and other basic utilities and services.

Towards this end, he has filed bills on: He has consistently opposed budget cuts in Philippine state colleges and universities, as well as the privatization of public hospitals and water districts.