To sneak. In the sixteenth century, to play truant: see N.E.D., miche, myche, &c.
1792. There is a kind of meaching souls in the world.Mass. Spy, March 22.
1801. He had lantern jaws and a meaching look.Spirit of the Farmers Museum, p. 287.
1832. The old man hauled in his horns and meeched off.Seba Smith, Major Jack Downing, p. 178 (1860).