行 这事我不管
“Okay. I won't meddle in this.”
THE DIALOGUE REEL
“He must have scammed all that money.”
行 这事 我不管
“Okay. I won't meddle in this.”
“Let's listen to Dragon. Dragon, be the judge here.”
“Sort it out yourselves, I am washing my hands of this mess.”
In interpersonal disputes, declining to mediate or taking a step back ('不管') is a common tactic to protect oneself from messy entanglements or blame.
LEARNING CHUNKS & PARTICLES
I am not getting involved in this / I won't handle this matter
A blunt, casual phrase used to refuse involvement or wash one's hands of trouble.
all right / fine
Can indicate agreement, but at the start of a sentence it often signals reluctant concession or exasperated dismissal.