Top Definition
Liar; braggart. First use recorded amongst irate residents of 19th century Widnes as an unflattering nickname for infamous French farmer William De Theantandec, who toured North-Western agricultural shows displaying cows with artificially glossed fur.
"I've got 13 million fans but don't want to come across as the Big I Am"

"13 million? It's 14 million and you know it, you Billy Bullshiner"
by mmarconi July 10, 2008
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