slim (v.)youdaoicibaDictYouDict[slim 词源字典]
1808, "to scamp one's work, do carelessly or superficially," from slim (adj.). Meaning "to make slim" (a garment, etc.) is from 1862; meaning "reduce (one's) weight" is from 1930. Related: Slimmed; slimming.[slim etymology, slim origin, 英语词源]