Slang;
An amount of a sufficiently
viscous substance such as mayonnaise or jelly to form a large
blob on a particular surface when placed there with a
kitchen utensil such as a table-spoon.
SINAED: "Would you like anything else with that?"
PADDY: "Yeah,
go on then. Give us a
dollop of mayonnaise, please.
SINAED: "Certainly Sir. My only place in life is to serve you."
A dollop of cum.