didapper

A small diving water bird frequenting rivers and fresh waters, specifically a little grebe or dabchick.

The misery of man may fitly be compar'd to a Di­dapper, who when she is under water, past our sight, and indeed can seem no more to us, rises again; […]

A scoundrel, a worthless person

If a Martin can play at cheſtes, as well as his nephewe the ape, he ſhall knowe what it is for a ſcaddle pawne, to croſſe a Biſhop in his owne walke. Such dydoppers must be taken vp, els theile not ſtick to check the king.

In earneſt thus; There is a Doctor and his Fart, that haue kept a foule ſtinking ſtirre in Paules Churchyard; I crie him mercie I ſlaundered him, he is ſcarſe a Doctor till he hath done his Acts: this dodipoule, this didopper, this profeſſed poetical braggart, hath raild vpon me with out wit or art, in certaine foure penniworth of Letters, and three farthing-worth of Sonnets; now do I meane to preſent him and Shakerley to the Queens foole-taker for coatch-horſes: for two that draw more equallie in one Oratoriall yoke of vaine-glorie there is not vnder heauen.