Meaning

noun edible muscle of mollusks having fan-shaped shells; served broiled or poached or in salads or cream sauces

noun thin slice of meat (especially veal) usually fried or broiled

noun edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions

originInfluenced by standard British pronunciation of scallop.

Etymology from Wiktionary, CC BY-SA 3.0