α. (In plural form) 1500s mulliegrums, 1600s muligrubs, 1600s–1700s mouldy-grubs (in dictionaries), 1600s– mulligrubs, 1700s– mullygrubs, 1800s mulleygrubs; English regional 1800s– merlygrubs, 1800s– molligrubs, 1800s– mollygrubs, 1800s– mulgrubs, 1800s– murlygrubs, 1900s– mullygrups; U.S. regional 1700s ma-lé-grubbles, 1800s– mulligrubs, 1800s– mullygrubs, 1900s– mollygrooms, 1900s– mollygrubs, 1900s– muddigrubs, 1900s– mullygrumps; also Scottish 1700s 1900s– mullygrubs, 1800s molligrumphs, 1800s mollygrubs, 1800s mulligrumphs, 1800s mullygrumphs, 1800s mullygrumps, 1800s murdiegrups, 1800s– molligrubs, 1800s– mooligrubs, 1900s– mouligrubs.
β. (In singular form) 1600s mulligrube, 1600s mullygrub, 1700s mulligrub; English regional 1800s– mullygrub, 1800s– murlygrub; U.S. regional 1900s– mulligrub; Scottish 1800s– maligrumph, 1800s– mollygrub, 1900s– mulligrumph.
