Where does “mushhead” come from?

mushhead (English) comes from English MUSH, from English mushroom, from Middle English muscheron, from Anglo-Norman musherum, from Old French moisseron, from Old French mosse, from Frankish mosa, from Proto-Germanic musą — fly, stinging fly, gnat; moist, damp; swamp,...

mushhead (English): A stupid person

Definitions

  1. A stupid person

Ancestry of “mushhead”, step by step

mushhead traces back through two separate lines of ancestry.

via English MUSH

StepLanguageWordMeaning
1EnglishMUSHA form of multi-user dungeon, often used for...
2EnglishmushroomAny of the fleshy fruiting bodies of fungi...
3Middle Englishmuscheronmushroom
4Anglo-Normanmusherum
5Old Frenchmoisseron
6Old Frenchmossemoss
7Frankishmosamoss
8Proto-Germanicmusąmoss, bog
9Proto-Indo-Europeanmūs-fly, stinging fly, gnat; moist, damp; swamp,...

via English head

StepLanguageWordMeaning
1EnglishheadThe part of the body of an animal or human which...
2English-yAdded to nouns and adjectives to form adjectives...
3Middle English-yDesignates an adjective, in many cases formed by...
4Old English-iġ-y, -ic
5Proto-West Germanic-gForms adjectives from nouns and verbs with a...
6Proto-Germanic-gaz-y
7Proto-Indo-European-ḱos-y, -ic
Every word from Proto-Indo-European mūs-