To steal; appropriate; swipe: A streetwalker would have snaffled the lot(1725+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
snail mail in Technology
messaging (Or "snailmail", "smail" from "US Mail" via "USnail"; "paper mail"). Bits of dead tree sent via the postal service as opposed to electronic mail. One's postal address is, correspondingly, a "snail (mail) address". There have even been parody USnail posters and stamps made. The variant "paper-net" is a hackish way of referring to the postal service, comparing it to a very slow, low-reliability network. Sig blocks sometimes include a "Paper-Net:" header just before the sender's postal address; common variants of this are "Papernet" and "P-Net". Note that the standard netiquette guidelines discourage this practice as a waste of bandwidth, since netters are quite unlikely to casually use postal addresses and if they really wanted your snail mail address they could always ask for it by e-mail. Compare voice-net, sneakernet, P-mail. (1995-01-31)
Ordinary postal service, as opposed to electronic communications. For example, He hasn't taken to his computer so he's still using snail mail. This slangy idiom, alluding to the alleged slowness of the snail, caught on at least partly for its rhyme.