The story
From mother + -out-law, by analogy to mother-in-law.
Etymology from Wiktionary, CC BY-SA 4.0.
mother-out-law
Today it means: The mother of one's boyfriend or girlfriend. Full definition →
Today it means: The mother of one's boyfriend or girlfriend. Full definition →
From mother + -out-law, by analogy to mother-in-law.
Etymology from Wiktionary, CC BY-SA 4.0.