mum·ble·ty-peg 
(mŭmbəl-tē-pĕg′, -blē-pĕg′) also mum·ble-the-peg (-bəl-thə-)
(mŭmbəl-tē-pĕg′, -blē-pĕg′) also mum·ble-the-peg (-bəl-thə-)n.
A game in which players toss a jackknife in various prescribed ways, with the object being to make the blade stick firmly into the ground.
[From the phrase mumble the peg, from the fact that originally the loser had to pull up with the teeth a peg driven into the ground.]