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1) informal greeting way among young male friends. Should not be used to greet older people.
2) Some Karate practicing people may be using this term in place of such as "yes sir*. However, it seems this word is a recent invention and not so much used among degnified old Karate-ka.
1) When two boys meet, they may say "ossu" "ossu" like "Hi" "Hello".
2) Karate-ka 1 show example, another may say "ossu".
ossu by Ramunenakayam November 14, 2007
Related Words
ossum ossu össur ossues ossuh Ossule Ossumble Ossum Possum
"ossu" is a term used on the irc channel #GAYM on the ChatSpike network to replace osu (or osu!), which is a rhythm game where you move and click your mouse to the beat.

The reason this term is used is because the bot in #GAYM will remove your ability to talk in the channel if you say "osu."
<Guy1> Let's play some osu!!
*** GAYM sets channel #GAYM mode -v Guy1
<Guy2> ossu sCK
ossu by Detrimentalist August 7, 2011
Extremely informal Japanese word of acknowledgement. Rude in polite situations.

Commonly used to greet members of the same social group (friends, classmates), or even acknowledgement in martial arts.

The u is typically not pronounced, and the o is a hard "Oh".

Similar to an informal "uissu". Typically associated with 'bros'.
"Ossu! Temee, how's it going?"
ossu by Sylistine September 17, 2023
A common misspelling but the proper pronunciation of the more superfluous awesome. Note the brevity of this version, making it much more appropriate for normal situation. Examine these contrasting examples:
"Forsooth, the divine wonders of the Lord God Almighty on High be verily awesome."

"Dude, that game was ossum."
ossum by MarkusRTK February 12, 2004
derived from the dead word 'awesome' which died a cruel and lingering death in the early twenty-first century. Originally something producing mouth-opening amazement, the word degenerated into a meaningless blather, frequently the opposite of its' intended meaning. Used by aspiring hipsters, noobs, and TV personalities to denote anything from the mildly interesting to the flatly mindless, its' evolution necessitated the new spelling to distinguish it from its' former relevance.
His ipad was about as ossum as a possum/"I farted." "Ossum!"/"You are so clever, so hip- may I touch the ossum hem of your garment?"
ossum by caerhawk February 16, 2010
new spelling of the word "awesome" to seperate the different meanings. Ossum meaning "cool" and awesome meaning "filling one with awe" or sim.
Did you see him shredding? Fuckin' ossum!
ossum by BTW November 3, 2004