the world > animals > animal body > markings or colourings > [adjective] > dappled or spotted > having dark spots on light ground
the world > physical sensation > cleanness and dirtiness > dirtiness > infestation by noxious creatures > [adjective] > with insects > with fleas
1696 No. 3194/4 A flea-bit Mare.
1830 O. W. Holmes (1852) 181 The small-voiced pug-dog welcomes in the sun, And flea-bit mongrels..give answer all.
1917 E. Pound 195 Sheep! jabbing the wool upon their flea-bit backs.