Kiefen is a Dutch slang term and means smoking marijuana. It is often used in Dutch rap and songs and is very popular with the youth and various Discord communities.
English variant: "Hey bro, when are we going to go kiefen?" "I'm in, let's do it."
Dutch variant: "Wanneer ff kiefen?" "Ik denk wel soon man bro."
When a nigga squelches
Maaaaaaan, that nigga really be chiefen fo a kiefen!