First thing let you know is I'm not well at English writing.
And my question is what this phrase's accurate contextual meaning.
"They can chew you up, but they gotta spit you back out."
I've seen this phrase in HBO TV series "The Wire" (season2-e2).
Is this phrase really means
"Don't pick a fight with that person, you're likely to lose."?
I don't get it. Because, McNulty said "Fuck it." before saying that phrase. And he seems doing express some sarcastic and rebellious nuance to me, at least.
So, can I get some help?