In Canada Poppers are mixing tobacco with Cannabis
In the US Poppers is Amyl Nitrate and used for relaxing your rectum for anal sex. When I showed Canadians urban dictionary and what Americans call poppers they couldn't believe it
In Australian terms it's the text you receive from your friend a few minutes after he disappears into a pub toilet accompanied by a guy wearing wraparound sunnies and holding a rolled-up $5 note.
I’m Australian, so not up on US terminolgy :-)