5 yrs old: Quite easy to come by! 10 yrs old: Might be growing out of it a little... 15 yrs old: I can imagine it, but at the same time, tricky. 20 yrs old: At this point, you might have grown out of this.All in all, this is a cute nickname!
Reminds me of Timmy Turner from The Fairly OddParents, the boy in pink with two magical fairies. I wear pink a lot (including a pink shirt, baseball cap, and hoodie), and sometimes I am given the nickname "Timmy Turner".
Very infantile and annoying. This name can't sound very good to those who have watched the overrated crap program South Park with its, well, mentally challenged character Timmy. I stopped watching long ago, some time after the episode where women were explained to be succubuses, or succubi, whatever, but the name still brings that image to mind.