sophia's sneeze 

Any girl named sophia, sophi, or sophie generally has a unique sneeze. It could be unique because of timing, pitch, or sound. The girl does not necessarily have to have the name "sophia", although any uniquely timed, unique sounding, or unique pitched female sneeze is still called a "sophia's sneeze".

Charlie: Let us have a moment of silence for our beloved friend and coworker, Steve Jobs.
Everyone: *silent*
Alice: *sneeze*
Charlie: Wow, well that's sophia's sneeze for you.

or

Sophia: ACHAGAZUNHEIIIIGGHHT!!
Kyle: Figures. Your name is sophia, so obviously you'd have the signature "sophia's sneeze".

or

Sophi: *sounding like a mouse* Achoo.
Frank: To be frank, you do have a sophia's sneeze

sophia's sneeze by JoJojo July 5, 2012