1. [late 19C+] (also blag job, blague) robbery, often with violence, esp. of a bank or post office.
2. [1920s+] bag-snatching, watch-stealing.
3. [1930s+] a wages snatch.
4. [1940s+] (orig. UK Und.) a persuasive if lying story.
5. [1990s+] (Irish) an oppprtunity for crime.
[1950s+] a pay-roll robber.