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What does 100% always mean? 3

I saw it on a friend's profile, Mye, and I thought it was in Spanish, but I don't know what that means. Whenever I ask someone I know who speaks Spanish, they don't answer. What is a monster? I believe and would appreciate any help! And especially if you speak Spanish! Thanks for all the answers. I tried it and it didn't work. Please help me !?

Always careless ... I think it's like giving 100% every time.

It's like the Americans say, 1, ex. Basically, be honest or give your all. Etc.