The correct spelling for the term "most splinter" is actually "mos splinter". The word "mos" is a British slang term for "most" and it is pronounced as /mɒs/. Meanwhile, "splinter" is pronounced as /ˈsplɪntər/. Therefore, "mos splinter" is pronounced as /mɒs ˈsplɪntər/. This unique phrase is often used to describe something or someone who is constantly breaking apart or falling apart easily, with small fragments or splinters.