Top Definition
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.
by Bam_Bam April 29, 2010

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