To be
smoking pipes filled with
marijuana. This defonition is refered to when the user would rather not directly refer to the meaning of his or her own statement to the public, before or after the action of smokeing
marijuana.
The young friend
said to the other whilst in
front of a parent or guardian, "last night we were
just watching a movie and s'n p's". Usually such a statement is followed by laughter or a comment about what they might have meant by what they said.