What does slugged mean when used in the book outsiders?

The term 'slugged' is used in the book 'The Outsiders' by S.E. Hinton to refer to the act of hitting someone with a fist. It is a slang term that is commonly used in the context of street fights or physical confrontations. In the book, it is often used by the characters to describe their encounters with rival gang members or other individuals they are in conflict with.