(dab) noun
1. One of various flounders, especially the American sand dab (Limanda ferruginea) of the Atlantic and Pacific coasts.
2. Any flatfish. [Origin uncertain]

(dab) Brit. Colloq.
A skilful person; an adept. [Origin uncertain]

(dab) noun
1. A gentle blow; a pat.
2. A quick stroke or thrust; a peck.
3. A small lump or patch of soft substance, as butter or paint; hence, a little bit.
—v.t. & v.i. dabbed, dab·bing
1. To strike softly; tap.
2. To peck.
3. To pat with something soft and damp.
4. To apply (paint, etc.) with light strokes. [ME dabben. Cf. G tappe footprint, MDu. dabben fumble, dabble.]