"a lump or glob," 1812, from earlier dallop "a patch, tuft or clump of grass" (1570s), an East Anglian dialect word of uncertain origin. As a verb, "serve out in large lumps," from 1825. Related: Dolloped; dolloping.
doleful
dolesome
doll
dollar
dollhouse
dollop
dolly
dolmen
dolomite
Dolores
dolorous