School slang. [Origin unascertained.] intr. To slip out; to escape unobserved from school or house; to break bounds. Also Tibble v., in same sense.
1840. J. T. Hewlett, P. Priggins, iii. A trick acquired from tibbling-out down the lane, i. e. Charterhouse Lane, to the Red Cow.
1855. Thackeray, Newcomes, ii. Tibbing out and receiving the penalty therefor. Ibid., lxxix. I used what they call to tib out and run down to a public-house.
