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
Idioms and Phrases with snail-mail
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.