Thumb tribe

Thumb tribe or sometimes thumb generation is the younger generation with members who are more adept at texting using their thumbs than talking on the phone. The concept identifies a trend among young people who use mobile phones for many activities, such as texting, email, entertainment, and conversations, as opposed to using keyboards with traditional desktop computers, and marks a shift in the favorite digit such that activities typically done by the forefinger, such as pointing at things or ringing doorbells, are being done with the thumb. The term "thumb tribe" has been used by marketers to identify younger consumers and in politics to identify persons who are not part of the younger generation, such as American politician Mitt Romney, who may have a mobile phone but does not use it dexterously. According to researchers, this has led to the thumb being physically stronger and more flexible for many young people. There are medical implications as well; excessive use of thumbs can lead to muscle pain and possible occupational problems.
The term "thumb tribe" was first used in Japan to identify the "younger generation of Japanese texters". Japanese youth used their "keitai" or mobile phone to download music, access Japan's version of Myspace called "mixi", surf the web, check train timetables and so forth. This group is identified as a common source of smart mobs that assemble seemingly spontaneously. The Japanese texting style relies heavily on the thumb, according to a report in "NBC News".