A person that is a hard worker at what he/she does.These people are the future champions or Bo$$e$ of the world.
"Train like an underdog, win like a champion" -Rockafella Family
" That kid was in the dark. He was a true underdog. Now look at him, he's the Bo$$."
A person that talks in slang in the right place, time, person etc. Most of these people can handle a conversation at ease.
" The Bo$$ is a slanguistic mack daddy"