Definition of without (so much as) a by your leave
- He borrowed my car without so much as a by your leave!
: great in quantity, amount, extent, or degree
: great in importance or significance
: many in number
: to a great degree or extent : considerably
: frequently, often
: a great quantity, amount, extent, or degree
: something considerable or impressive
What made you want to look up without (so much as) a by your leave? Please tell us where you read or heard it (including the quote, if possible).