And hitting stains on birthday candles
“Hitting stain’s” is Chicago slang for stealing or robbing. Birthday candles is a reference to the young years of children’s lives. Chano is basically saying that the city is taking away the lives of young children.
This is also a play on the first and third line of the bridge. He’s glad to have lived another year, he got here by cheating death, and as a result he’s stolen another year. Thus, he can metaphorically add another birthday candle to his cake.
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