Make a bet on terms favorable to the other party, as in I'll lay odds that it will rain before the week is out. [c. 1600] The closely related lay a wager means “make a bet,” as in He laid a wager that Don would be late. [c. 1300]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.