Bastard mahogany
an Australian tree, Eucalyptus botryoides, of the myrtle family, having lance-shaped leaves and furrowed bark.
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- Bastard measles  noun (pathol) an informal name for rubella 
- Dunois  Jean [zhahn] /ʒɑ̃/ (Show IPA), Comte de (“Bastard of Orleans”) 1403?–68, French military leader: relieved by Joan of Arc and her troops when besieged at Orleans. Historical Examples Dunois’ evidence appears to have been written down by a clerk unacquainted with events. The Life of Joan of Arc, Vol. 1 and 2 (of 2) Anatole […] 
- Bastard operator from hell  bastard operator from hell humour (BOFH) A rogue network operator character invented by Simon Travaglia , regularly featured in “Computing” and “DATAMATION” magazine. See also: Dilbert. (http://angelfire.com/bc/simont/index.html). (1999-09-17) 
- Bastard pointing  an imitation of tuck pointing, having a fillet made from the mortar of the joint. 
- Bastard ridley  ridley (def 1). 
