Fun Dip is a candy found in US/Canada. It is unique in the fact that it requires two separate candies to be combined in order to properly enjoy it's intended mode of consumption. First, a tasteless sugar stick must be licked, then it must be dipped into one of three included packets of flavored sugar powder. If you remove the three packets, you are left with the tasteless sugar sticks, making the product incomplete, worthless, and bland. Therefore, describing someone as 'three packets short of a Fun Dip' means they are (a) missing general intelligence or (b) lacking flavor (in the personal sense).
A being who is not considered a full blown radgy/ radgie because of their size. Usually a young relative or friend of a radgy/s who is learning the traits, or a guy who has angry little man syndrome and thinks they can take on anyone.
seen that little guyover there, he just asked me for a "lend of a half a quid" or he'd tax me. A told him to fuck off, stupid radge packet.
you seen that crazy kid?! absolute packet of radge, man!