No capper 

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.

That new restaurant is good asl, no capper. You gotta try their new smoothies.

No capper by slangmandict April 20, 2025

No Casper 

“No Casper” is derived from the gen z English time period correlating with the term “cap”. For the boomers who cannot understand either of these terms, put your reading glasses on and prepare for an elegant journey as you try to catch up on modern day English. “Yo I finessed that midterm straight out the ghosty no Casper” as you can see here chad has a confident demeanor as he’s just finished a test in which he feels cannot go wrong. “No casper” holds this to be true.

Lowwmaine

Chad: You see that girl over there?

Dwight: yeh
Chad: I’m bout to spit game straight from the ghosty no Casper

Dwight: damn, from the ghosty? That’s straight up poetic son. Best of luck on your endeavors, no casper.

No Casper by Lowwmaine October 15, 2019

No Casper 

1. Meaning no bs

2. Said when people suck at vaping or smoking

No Casper bro let me show you how’s it done

No Casper by Purpletigers101 June 1, 2019

no caperonies 

when you want to add stronger belief to what your saying ,like another confirmation of truth.

i believe she did it ,no caperonies!

no caperonies by it’s.mi_mi/ samiya December 6, 2020