> as lemmas

1844 N.Y. Herald 17 Nov. 1/4 We beg permission to call the attention of our readers to the following..Liberianisms... You better believe it.

1856 Yale Literary Mag. 21 171 You'd better believe, I'll live in the clover.

1872 O. W. Holmes Poet at Breakfast-table x. 331 My old gentleman means to be Mayor or Governor or President..you'd better b'lieve.

1915 P. Ginther Miss Pat in Old World i. 23 ‘Do you mean it, Norn?’ she asked almost in a whisper. ‘Do you mean that we shall go to Holland?’ ‘You better believe it,’ said Bruce vigorously.

1968 Globe & Mail (Toronto) 17 Feb. 42 (advt.) You'd better believe it... We've got 'em.

1997 J. Ryan Dismantling Mr Doyle iii. 35 That's how smart Haley was. You better believe it.

2003 Time 28 Apr. 61/2 More than 500,000 women die in the U.S. each year of cardiovascular disease... Women and heart disease? Better believe it.