0"He's home" is not really slang, but it is informal. It's fine to use in conversation or in informal writing. "Where's John today?" "He's home - he's not feeling well." 0-
0Hi,02br 02br 00I'd like to offer another opinion.02br 02br 00If the question is "Where's John today?", I'd say 'He's at home'.02br 02br 00On the other hand, if I am sitting in the living room and John comes in, I'd call to my wife in the kitchen to tell her 'John's home', meaning 'John has arrived home'.02br 02br 00