A person with below 0 iq, which is impossible in itself, but somehow the children below 9 who play him achieve it. Yasuo is the only kid friendly champion in league without any NSFW+ ties online because only children play him. He is the most cancerous champion in existence, second only to Teemo, the devil himself.

Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed

Derived from the game League Of legends a Yasuo main has accomplished nothing and will never do anything in his life, they are usually stuck in this bubble where they think are awesome because they play someone who takes no skill.

A dude that mainly plays the League of Legends character "Yasuo'' that is completly over powered and broken.
Making them an complete asshole

That one person your team in any competitive game who singlehandedly loses the entire game, regardless of how well you and the rest of your team is doing.

This means, you'll suck anyway at any league of legends game mode.

A League of Legends player who is toxic and only wants to play Yasuo, but actually doesn't know how to play him and feeds in every game.