Ajagun Buka Suka Dimka (ẹniti ó ṣe aláìsí ní ọj́ọ karùńdínlógún, osù karùń, ọdún 1976) j́ẹ ọmọ ogun oríléèdè Nàìjíríà. Ó kópa nínu ìgbìmọ̀ láti gba ìjọba oríléèdè Nàìjíríà lówo ̀Ọgágun Àgú̀iyí ̀Iróǹsí ní ọdún 1966. Ajagun Díḿkà sì túń kópa nínu ìgbìmọ̀ láti gba ìjoba lówo àrẹ oríléèdè, Ọgágun Murtala Ramat Mohammed ní ọj̣́o kẹtàlá, osù kejì, ọdún 1976. Ṣùgb́ọn, ìgbìm̀ọ yí k̀unọ̀ láti ṣe àseyọrí nínu gb́igba ìjọba fún ara wọn, b́i ́o ti l̀ẹ j́ẹ wípé, ìyànjú wọn ṣe ikú pa Ọgágun Murtala Ramat Mohammed. Dimka, then a lieutenant with the Nigerian Military Training College in Kaduna, was one of the many officers of northern Nigerian origin including Lt. Colonel Murtala Muhammed (coup leader whom Dimka conspired against and murdered ten years later), 2nd Lieutenant Sani Abacha, Lieutenant Muhammadu Buhari, Lieutenant Ibrahim Bako, Lieutenant Ibrahim Babangida, and Major Theophilus Danjuma among others), staged what became known as the Nigerian counter-coup of 1966 because of grievances they felt towards the administration of General Aguiyi Ironsi's government which quelled the 15 January 1966 coup.