mull pipe
n.— «I stopped at a red light and some obnoxious kid in school uniform started pointing at me to his friends and yelling “look, mull pipe!! Mull pipe!!” (that’s pot pipe in your parlance).» —“Re: Funny episodes related to pipe smoking” by Norman Lever Usenet: alt.smokers.pipes June 26, 2004. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...