Popular anime and manga series centered around the exploits of one Eikichi Onizuka, a musclebound blonde ex-biker gang member who decides he wants to become a high school teacher to win the 'hearts' of virgin schoolgirls. However, we quickly find out that he's really a tough guy with a heart of gold who wins over each and every student that tries to get him fired by using his street smarts to inspire them and rid them of their inner demons.
Kihachiro Onitsuka was a Japanese soldier who after WWII decided that sports would be good for Japanese youth. He therefore learned how to make shoes circa 1949. He then founded Onitsuka Co Ltd. In 1958 he bought the "Tiger" brand. In 1972 they merged with another company called Jelenk and then they decided they needed a new name. So,they found an old latin phrase that said, "Anima Sana In Corpore Sano"; which means, "A soundmind in a sound body". By taking the first letters of each word in the latin phrase you get ASICS, which is the name of the shoe brand.
Now a days Onitsuka's are used alot by the "scene" or "scenester" subcultures, specifically those consisting of indie and hipster styles.
Man 1: Dude, look at that guy with the onistuka's, that's so hardcore!
Man 2: Scene! Onitsuka's are sooo expensive...
People who come into a bar for the sole reason that have nowhere else to go and are basically waiting to die. Ususally these people have no lives, jobs or friends and rely people who are not aware of what social leeches they are and accidentally engage them in conversation.
New guy just sat down next to that walking obituary who is actually knitting at the end of the bar and won't shut up about her 12 dead husbands and having to put her cat down.