Top definition
Not of material interest oneself. Not one's business. Not an activity one would typically engage in under normal circumstances.
"Leeroy, ya djam fool buoy. Get yourselt oder 'ere an' have a tug on dis 'ere crack pipe."

"That's jolly decent of you Winston my dear boy, but freebasing crack cocaine is really not my pigeon. These days I stick to mainlining skag and the occassional speedball."
by Mikee T September 29, 2006
Get the mug
Get a Not my pigeon mug for your coworker Julia.