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Actually its not the most offensive swear word in arabic.

The word origin is from the west cost of Saudi Arabia ( Jeddah) then moved to the north to Syria, Lebanon , Palestine (where apparently they use it the wrong way).. etc ..
Literally it means "your mothers vagina" , but its short for " shove it up your mothers vagina " its used to be " fee Kuss ummak "
Usage: said when someone refuses to give you something , you tell him , kuss ummak I dont want it . as in you can keep it.
Ali : Give me your car keys.
Fahad: No
Ali : kisumuk I dont want your fuckin car.
kisumuk by AK Omar June 11, 2006
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This word is one of the most offensive 'swearwords' in arabic. It is very disrespectful when used, as it usually starts a fight. It basically means 'your mothers vagina' but in a much vulgur way.
But between friends, it is used in an innocent way.
'Who the hell do you think you are? Get out of my sight! KISUMUK!!!'
kisumuk by M-S September 25, 2005
Related Words

Kusumukh 

An offensive term used for people whose name starts with the letter 'b' and ends with 'n' associated with monsters, usually the leader. Can be defined as the pussy of an old woman, usually one that is very wrinkled and hairy.
Kusumukh
Kusumukh by legends99 June 28, 2009
Its someone called siddharth . Specifically with initials N .
Siddharth is a kisumu
He is an idiot.
kisumu by Jakvsbe June 18, 2023
The word 'flag' as pronounced by people with thick Belfast accents. The term is a perfect encapsulation of the disproportionate and overblown reaction to the removal of the Union Jack (as in 'de fleg') from above City Hall in Belfast. Where previously it had flown for 365 days per year, it is now flown on 17 designated days of the year - in line with many other British cities.

The event caused a portion of the Protestant community ('fleggers') to make international pricks of themselves as they proceeded to wreck the fucking place, claiming it was another erosion of a 'British' identity they perceive to have been under attack since the horrifying spectre of equality reared its head in Northern Ireland.

The word 'fleg' - and indeed 'fleggers' - fittingly describes a section of humanity unconcerned with knowledge, reality or the vagaries of the English language. Like America's tea-baggers they are ruled by instinct, fear and paranoia with a side dish of rampant bigotry and startling ignorance of the world around them.
"Wat de fuck like! The taigs got de fleg took down! Let's wreck de fuckin place! No surrender!"

"De fleg has been took down! Before ye know it there'll be a united Ireland! Attack Short Strand! God Save The Queen!"
Fleg by OnionFleg August 9, 2013
Word of the Day on July 18, 2026
To take something small, that doesn't quite qualify as a theft. Probably from the Danish "skæv" or the Dutch "scheef", both of which are pronounced similarly, meaning "askew, or not quite right'. To change an item's ownership without permission, but only something small and of little worth.
"I skeefed an apple off the neighbor's tree." "I skeefed some chips outta your bag when you looked away." "Don't skeef my chair when I go to the bathroom."
Skeef by kachinaflonk July 16, 2026
Word of the Day on July 17, 2026

Hair spider

A tight, tangled knot of loose hair and lint that forms inside clothing during the clothes dryer cycle. It typically hides inside garments, causing an annoying lump or a phantom tickling sensation against the skin until it is found or falls out onto the floor during folding.
I was folding my clothes and a huge hair spider fell out onto my hand
Hair spider by Kmorsels July 15, 2026
Word of the Day on July 16, 2026