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when someone causes gaps in lines by not moving forward when appropriate or requiring too much personal space.
The slunderous students made the lunch line move slower and appear much longer than it really was.
slunder by josephthetwineguy July 19, 2018
the act of "sliding under" specifically a desk or table. Most often occurs in during extremely boring lectures or by small children trying to make a sneaky get-away from the dinner table.
The class size dropped considerably as more and more students slundered to take naps.

After perfecting his slundering skills, Drew seemed to get shorter and shorter over the course of the meal, until he disappeared all together.
slunder by nerdyAthlete October 4, 2009
woman: to smack a woman's breast from the side at a sensitive time.
man: to smack the head of a man's penis after sex.
"I sucked her titty and then slundered her boob!"

"I fucked his brains out, then slundered him in the shower. He Cried."
Slunder by Tyler K. August 27, 2005
The verb "to slunder" means to soil, ruin in a dirty way, make grimy or filthy - but in a non-physical way (see examples). It originates from "slander", and the "un" which is changed originated either from a desire to incorporate "under" into the word - or, more likely, to utilise the un sound from cunt - and thus capture some of the foulness of that, the most terrible of words.
"That wraggot just slundered the atmosphere"

"Don't slunder that little girl's mind"

"The percussionist is slundering this song"
Slunder by Mistermiagi January 10, 2005
Slunder is an insult to people who are lazy and and just horrible
Stop being such a slunder, are you serious?
Slunder by hehurmum March 29, 2024

roblox slender 

what happens when you drink and smoke while pregnant
Drinking and smoking wont affect my child
little do they know their kid will be a roblox slender
roblox slender by the random idiot December 25, 2021