Adjective: Successful in producing a shitty results; ineffective.

Contrast with "efficacious".
The medicine was defficacious; My cough only worsened after taking it.

His defficacious work resulted in extended work hours for all his co-workers.
by efficacious_eruditer May 11, 2012

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×