Merriam-Webster's Collegiate® Dictionary, 11th Edition
BASTARD
I. noun
Etymology: Middle English, from Anglo-French, probably of Germanic origin; akin to Old Frisian bost marriage, Old English bindan to bind
Date: 14th century
an illegitimate child, something that is spurious, irregular, inferior, or of questionable origin,
3. an offensive or disagreeable person, man , fellow , bastardly adjective
II. adjective
Date: 14th century
illegitimate , of mixed or ill-conceived origin , of abnormal shape or irregular size, of a kind similar to but inferior to or less typical than some standard, lacking genuineness or authority ; false