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1.
A piker who frequents teas, dinners ans other entertainments but makes no attempts to repay his social obligations.
We have had Cecil to tea six times this season, and that bun duster has yet to reciprocate.
by Bob Proczko October 16, 2006
 
2.
An extended and loud fart, preferably with hot and filfthy stink attached to it.
After that cabbage soup at lunch, I was ripping Bun-Dusters all afternoon in my office.
by Tony Spilotro November 12, 2002