happy slap
Youths trying to act rude can be most male and female randomly slapping people either complete strangers or people they know. More recently it is private school kids in London(have been some cases in southend) trying to prove they arent lil rich kids. Started in public schools. After it was made illegal the name has been changed and there are now many different names plus many different variations of how it's done.
Group of boys aged 15 approach me from behind nd happy slap me. i spin round, grab the phone and through it under a passing bus. Phone completely crushed. Me laughing.