dol·lop 
(dŏləp)
(dŏləp)n.
1. A lump or portion of semisolid matter: a dollop of whipped cream.
2. A small quantity or splash of a liquid: a dollop of whiskey.
3. A modicum; a bit: not a dollop of truth to the story.
[Earlier tuft, clump; perhaps akin to Norwegian dolp, lump.]