trevim said:
Side note: Can someone explain me what is this Froomey, Gossy, Cookie thing? Is this some anglophone thing? It sounds so weird....
As Element points out, it's a British/Aussie nicknaming system based on surnames. Not all surnames are suitable though and the nickname should be one or two syllables.
Basically, you have three options:
1. Shorten and add -o (more favoured by Aussies)
2. Shorten and add -s
3. Add -y (or on rare occasions -sy)
Play team sports long enough and you get an instinct for which is the right option. If Trevim was your surname then you'd be Trevs in UK, but maybe Trevo in Oz, but certainly not Trevy or Trevimy.
The options are beautifully illustrated by the classic Manchester United midfield of the late 90s/early 00s - Becks, Scholesy, Keano and Giggsy.