A Li'l Twat Munchiken Arsehole can be defined as a male most likely around the ages of 40 who was unlucky enough to have the blessings of god and thus lacks the gift of puberty. Basicallyanother word for "small pp boy" but just add a bit of McGregor twist to it.
I pity Yohan for being a Li'l Twat Munchiken Arsehole, its fine if he can't cum, adoption is an option.
I was in grade 1 with a boy named Munchikunda. I was so enthralled with his odd name, 22 yrs later i still use the word when there is nothing else to say.