The story
Compare typologically Russian ума́сливать (umáslivatʹ) (< ма́сло (máslo)).
Etymology from Wiktionary, CC BY-SA 4.0.
butter up
Today it means: To flatter, especially with the intent of personal gain. Full definition →
Today it means: To flatter, especially with the intent of personal gain. Full definition →
Compare typologically Russian ума́сливать (umáslivatʹ) (< ма́сло (máslo)).
Etymology from Wiktionary, CC BY-SA 4.0.