1. a person who is lazy and does absolutely nothing all day, someone who is characterized by their laziness and unwillingness come out of the basement
2. someone who is extremely messy
"Girls, you are the two biggest sluggers ever, get OUT of that basement!"
"It's four in the afternoon and that slugger still hasn't gotten out of bed."
"CLEAN YOUR ROOM. I HAVE NEVER SEEN A MESSIER SLUGGER IN MY LIFE!"
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