I'm one of those people who that struggle to remember EVERY ONE's name, so I use nicknames to remember them by. Either their own or I make one up my own (those i usually keep to myself till their name sticks :P )
My mother gave me my 1st nickname: Vlooi (it means flea in my home language - Afrikaans) because I'm so small and
fast.
I then later changed it to "Flooi" to be different and later made one in Japanese: Nomi (which also means
flea)
My cousin then gave my my favorite nickname: Miss MeatPudding after reading my social chat status msg.
My very good friend calls me: Chibi-chan / nee-san