Shlapac 

Very stupid and dumb.

My friend is very shlapac.

Shlapac by Your Polish Bestie October 2, 2023

shlapalapin 

ShLapping like a mufucka

Damn, this burger is Shlapalapin.

Woah, your car is Shlapalapin homie, where you get it from?

shlapalapin by littlek101 February 19, 2018

Slapaca 

An adjective for an annoying individual with big flat feet who slaps them on hard surfaces in a penguin like manner.

This questionable creature can be found amongst you.

Probulia me ova ne skolovana slapaca.

Slapaca by Lab.rat January 1, 2022