No capper noʊ ˈkæpər interjection (slang, emphatic). An intensified form of the slang interjection "no cap," used to emphatically assert the truthfulness or sincerity of a preceding or following statement. The addition of the "-er" suffix, typically associated with a hard "r" sound, serves to heighten the level of conviction being expressed.
by slangmandict April 20, 2025

Humanity’s greatest failure, Capper is a slimy, disgusting freak of nature. The only thing more disgusting than his deformed kneecaps, is his blemished, repulsive face. He seems to think that he is the greatest human, however everyone laughs at his pathetic existence behind his back. Jesus did not die for inbred rats like capper.
Capper is a disgusting thing
by Moses Cool November 19, 2018

Person 1: "Oh, Syed said he'd come to workouts today"
Person 2: " hahaha that's hilarious, he's such a capper"
*Person 1 and 2 laugh for the next 30 minutes*
Person 2: " hahaha that's hilarious, he's such a capper"
*Person 1 and 2 laugh for the next 30 minutes*
by this man a capper August 8, 2021

That man right there is a capper.
by Blxntslxt December 23, 2021

by NooniCapper Shay February 26, 2018

Someone that backstabs and steps on others to further themselves. In many cases these individuals will lie to make them look better and try to convince others of their lies.
by AkbarCapper July 2, 2024

by MrPuckles March 6, 2017
