School slang. [Origin unascertained.] intr. To slip out; to escape unobserved from school or house; to break bounds. Also Tibble v., in same sense.
1841. J. T. J. Hewlett, Peter Priggins, I. iii. 89. 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.
