/mum"beuhl tee peg'/ , n.
a children's game played with a pocketknife, the object being to cause the blade to stick in the ground or a wooden surface by flipping the knife in a number of prescribed ways or from a number of prescribed positions.
Also, mumbledepeg, mumbledypeg /mum"beuhl dee peg'/ , mumble peg, mumble-the-peg /mum"beuhl dheuh peg'/ , mumblety-peg, mumbly-peg /mum"blee peg'/ .
[ 1620-30; from phrase mumble the peg (see MUMBLE); so named because the losing player was formerly required to pull a peg from the ground with his or her teeth ]