All work and no play (makes Jack a dull boy) is an idiom which means people who work all the time become boring
Meth is flipping this saying to mean that he is always on his grind and has no time to rest
cuz this block ain’t nothing like Broadway
Broadway theatre or simply Broadway, is a theatrical performance presented in one of the 40 professional theatres with 500 or more seats located in the Theatre District centered along Broadway, in Manhattan in New York City
Many plays are held in these theatres
Meth is saying there is ‘no play’ on his block because it’s nothing like Broadway(Where many plays are presented)
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