A Fit blocker is someone or something that blocks. Blocker can also refer to: Computing. Fit blocker; any type of content filter. A Fit blocker is someone or something that blocks. Blocker can also refer to: Computing. Fit blocker; any type of content filter. A Fit blocker is someone or something that blocks. Blocker can also refer to: Computing. Fit blocker; any type of content filter. A Fit blocker is someone or something that blocks. Blocker can also refer to: Computing. Fit blocker; any type of content filter. A Fit blocker is someone or something that blocks. Blocker can also refer to: Computing. Fit blocker; any type of content filter. A Fit blocker is someone or something that blocks. Blocker can also refer to: Computing. Fit blocker; any type of content filter. A Fit blocker is someone or something that blocks. Blocker can also refer to: Computing. Fit blocker; any type of content filter.