poke/stick your nose in/into something
poke (one's) nose in(to) (something)
To involve oneself in an intrusive or nosy manner into something that is not one's business or responsibility. I wish my neighbors would quit poking their noses in and just leave us alone! Don't poke your nose into your brother's affairs—he can manage well enough on his own.
poke your nose into somethingor
stick your nose into somethingINFORMAL
COMMON If someone pokes their nose into something or sticks their nose into it, they interfere in something that does not concern them. He has no right to go poking his nose into my affairs. I felt that they were sticking their noses into what was only my business. Compare with keep your nose out of something.