This is text shorthand that Filipinos use for the Tagalog word kasi (meaning: because).
Unrelated to that abbreviation, there is a famous celebrity in the Philippines named K.C. Concepcion, who is the daughter of “megastar” Sharon Cuneta.
Khit magsabi aq, wla dn nmn aq masasabi kc d q alm kung san sisimulan.
