Hey Alison! It's those kind of little things that sometimes only the Mama knows! I hope he is doing alright! Keep us updated on him [and your nephew]!
Hope you're talking about the movie, "Jeremiah Johnson"; that's the only place I think I ever heard the phrase. I use it in the majority of my correspondence with our Heroes. I think . . . no . . . I know Hubby has the whole movie memorized.
" 'Watch your Topknot!' . . . . . . .
'Watch yourn!' "