MEANING: noun: A promotional flier or a book extract packaged to showcase and promote a book.

ETYMOLOGY: Perhaps a blend of blurb + ad or an acronym for Basic/Book Layout and Design. Another possibility is from Scottish blad (fragment, portfolio). Earliest documented use: 1930s.

BX AD - promotional literature for am obsolete form of electrical cable

OB LAD - a boy baby

B DAD - so-so parent