How do you say little fat by in Russian?

Маленький монстр Malenʹkiĭ monstr

You would say it like: Я говоpю немножко по-pусски - Ya govoryu nemnozhko po-russki translating directly to: I (only) speak a little Russian.

Russian for "little sister" (meaning younger sister) is младшая сестра (pronounced MLATshaya seeSTRA).

Russian for 'very little' (as in: - Do you speak Russian? - Very little.) is немного (pronounced nemNOga).

nimnoshka