What is "didapper"

Dabchick \Dab"chick`\ (d[a^]b"ch[i^]k`), n. [For dabchick. See Dap, Dip, cf. Dipchick.] (Zo["o]l.) A small water bird ( Podilymbus podiceps), allied to the grebes, remarkable for its quickness in diving; -- called also dapchick, dobchick, dipchick, didapper, dobber, devil-diver, hell-diver, and pied-billed grebe. [1913 Webster] ||

n. 1 A small diving water bird frequenting rivers and fresh waters, specifically a little grebe. 2 (pejoratively) One who disappears for a time and suddenly reappears.