Nick name

Talking about nickname, I used to have one, given by my secondary school mates, they called me Miki, reason is my character like Mickey mouse...haha... that's long ago story but till now some still called me Miki. Still acceptable to be called Miki at my age? A bit funny... LOL.....Recently my 2 girls also have a funny nickname given by Ah Mah, Kaitlyn is 等一下 and Kait Yee is 不用紧, that's b'cos they used this phrase so frequently in a day. No matter what instructions given to Kaitlyn, the very first response is wait/等一下, while for mei mei, her attitude a bit tak apa, everything also 不用紧! I don't like this nickname for my girl, so I hope they can changed their attitude and be a lovely girl.