noun, plural bof·fos.
highly effective or successful: He gave a boffo performance as Cyrano.
Also boff·o·la [bo-foh-luh] /bɒˈfoʊ lə/.
Origin of boffo
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
slang very good; highly successful
a person who has extensive skill or knowledge in a particular field
Word Origin for boffo
C20: of uncertain origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
strikingly successful, by 1961, show biz slang, probably echoic of a "hit."
Online Etymology Dictionary, © 2010 Douglas Harper