perficient 

The opposite of proficient; being totally inept or unskilled at a given job or task.

He is completely perficient at his job and will probably get fired.

perficient by yellacommon October 9, 2020

Perfistent 

Perfistent adjective /pəˈfɪs.tənt/

Someone who refuses to stop during the sexual act of fisting.

Mary: How was your fisting session with that bull-dyke you pulled last night?

Nicole: Painful! I’d cum 5 times and begged for her to untie me but she just wouldn’t stop.

Mary: Perfistent slag.

Nicole: Yeah... I’m seeing her again tonight.

Perfistent by Bam_Bam April 29, 2010

proficient

Skilled, adept, competent.

He was very proficient in his task.

proficient by Larstait November 15, 2003

pooficient 

one who poops while doing other tasks.

Greg is the most pooficient person I've ever met! I mean just today he closed out a contract, approved all the back-logged changes, and gave me directions to the client all while taking a poop!

pooficient by biigsnook July 22, 2016

Toking Proficient 

adj - to be skilled at managing a comfortable level of cannabis relations in life

verb - to partake in such a manner as listed above

Janet's been meditating and working on art really well lately; she appears toking proficient.

Toking Proficient by gollygreen00 July 19, 2013