In local Sarawak Malay language, kimak origins from the phrase "puki mak" which means mother's vagina. However, "kimak" has been widely use as "motherfucker", laki has been explaimed by dezznuts_o2.
The usage of "kimak" is more as an adjective rather than a noun.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.