A polkie is a slang word for knife. Usually used by people who don't want people to know you are carrying a knife.
"Ay yo bro. I need a pokie for the week I'm having beef with someone they might just pull up"
HHC, also known as hexahydrocanabinol, is a legal cannabinoid primarily derived from the hemp plant. HHC is 70%-80% the strength of THC.
I bought these new legal weed gummies that contains HHC and no THC.