To miscalculate; to come to grief.
1854. Some men think the way they are going to be saviors is to get as many wives as they can, and save them; now, they may slip up on that, if that is their view, and their feelings extend no further.—Orson Hyde at the Mormon Tabernacle, Oct. 8: ‘Journal of Discourses,’ ii. 67.
1904. I usually pick a time when father is away, but I slipped up on my calculations this time.—W. N. Harben, ‘The Georgians,’ p. 21–2.
