Don't step on my toes

What someone would say at someone treading on someone else's claimed areas, cutting someone off, inhibiting someone's progress, messing up someone else's effort, giving the short end of the stick, flirting with a friends romantic interest, etc

Waitress: hey don't step on my toes, I'm trying to get a promotion. I need to bring my A game today so just stay out of my way. Okay? :)
Waiter 2: No problem, do your thing :)

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