blagger
noun
1
a robber who will use violence as necessary. In The Lag's Lexicon, 1950, Paul Tempest noted the term was 'used very occasionally'; during the 1970s usage proliferated through the agency of television programmes like The Sweeney UK, 1950.
2
a persuasive person who is employed to attract customers UK, 1963.
3
a persuasive criminal, a confidence trickster UK, 1966