No, Big Mike is often made up. It could be based on some elements of real life, but it's mainly a fictional construct to engage and entertain the audience.
Since I don't have a lot of information about this specific story, it's hard to say exactly who Mike Ross is. He could be an ordinary person with an interesting personal story that involves some sort of growth or change symbolized by 'big boy pants'.
It's offensive. Dick Grayson is a well - known character, and we should focus on his positive aspects like his heroism, his relationships in a non - vulgar way, and his role in the fictional universe. Using such a description not only shows disrespect to the character but also to the fans who appreciate the character for more positive reasons.
Since there's no clear information on who Big Mike is in football, it's hard to list his achievements. But if he was a well - known player, his achievements might include leading his team to victory in important games, being named an all - star player, or having high stats in things like rushing yards, passing yards (if he was a quarterback), or tackles (if he was on defense).
I'm not sure which specific 'Big Mike' in football you are referring to. There could be many players nicknamed that. Maybe you can give more details like which team he played for or in which era?
Most literature focuses on more positive, relatable and acceptable themes. Stories about bullying are common, but this specific and rather vulgar - sounding combination is not something that pops up in traditional literary canons. However, in some alternative or shock - value - seeking independent writing, there might be something remotely similar, but it's not a widespread or well - documented area in literature.