I am the youngest in my family, the baby you can say, I was growing up the "Little Laminack", that turned into "Grin" cause I couldn't never be caught not smiling(I think that was a triple negative, truly a work of art).. and its stuck.

I like the connotation that goes with "Grin", always smiling, joyful, cheerful mode, never a sad moment.. so on and so forth.. and I enjoy my nickname, it suites me very nicely.