Etymology
From Tagalog butsi / butse, possibly from Hokkien 麻糍 (môa-chî) or a similar cognate, or Spanish buche (“gulp a mouthful”). Compare Cebuano butsi (“Jian dui”), Tagalog matse (“Mache”), Cebuano masi (“Masi”), Kapampangan motsi (“Moche”).
Definitions & examples from Wiktionary (CC BY-SA 3.0).