The term MARBLES GAME can be broken down into two crossword solutions: MIBS (4 letters) and TAW (3 letters). MIBS is an acronym for the game Marbles, which is a game that has been around since ancient times. It involves players shooting small glass or plastic balls at other marbles in order to knock them out of a circle. TAW is an old English word meaning 'to throw'. Therefore, the term MARBLES GAME can be summarized as a game involving throwing marbles at each other.