lackuse
shorthand for lack of use, meaning that something is not used often or out of function
Mel had to throw away her old shoes - they were ugly and lackuse.
Peggy’s lackuse house was torn down last week.
Peggy’s lackuse house was torn down last week.
lackusation
Refers to where someone claims dat you are inferior in some way.
Before you make a lackusation about someone, you should first not only examine his life to see if there might be legitimate/unavoidable reasons for his shortfall, but also take a serious gander at your OWN performance, strengths and weaknesses, etc., to see if you yourself could reasonably have managed significantly better than the dude you're dissatisfied with is doing.