memuan noun English. A slightly irridescent, dark green, highly poisonous pit viper. The male has a reddish-brown belly. Example sentence: Subanen. Su gapu'u, iktuk memuan, minatay gupia, pu' nda' ganam meteka. English. My grandfather was bitten by a pit viper, and died right away, for they weren't able to give him an antidote immediately. Generic. mamak