This word for a blob or lump, perhaps of whipped cream, may come from dolpur, Icelandic for "fat man"
The name of this type of aircraft is from 2 Greek... [DOC] [TLE] dollop - English dictionary - Academic Dictionaries and Encyclopedias [PAR] ON dolp, small dangling ball] 1. a soft mass or blob, as of some food; lump 2. a ... 
Word forms dollop : singular dollop plural dollops informal 1) a large lump of ... 
You may want to read Wiktionary s entry on Dollop ... v.t.