Etymology From Middle English mong, monge, mang, from Old English ġemong, ġemang (“a mixture, mingling, throng, crowd, company”) (whence Modern English among), from Proto-Germanic *mangą (“mix”). Compare Proto-West Germanic *mangijan (“to knead, mix”).
Some blue cattle-dogs and a small pack of mongs barked excitedly, and danced round, and wished they knew what to do in such an unheard-of situation; and no doubt dreamed for days after of what they had done to distinguish themselves.1965, Brian James, The Big Burn: Short Stories, page 40: