Definitions by efficacious_eruditer

defficacious 

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.

defficacious by efficacious_eruditer October 20, 2012