Where one of your mates or work collegues has a "Jack Bastard Attitude", or where they act like a jack bastardcontinuously with the same attitude towards you.
The degree to which something is affiliated with or resembles Japan and its culture and people. Something with a high degree of japtitude would be very Japanese.
It comes from the word, "aptitude." And originated as a sort of pun between "Jap" and "aptitude."
the Jatt Attitude; Jatt is a term used to identifythe People of Punjab (India), especially sikhs. They Punjabis are known for their high-spirited living and attitude, thus the term Jattitude indicates a person having Jatt attitude.