When a male ejaculates in someone's ass and when that person next shits the first bit will have a white top, hence "snow top"
I heard she got a snow top last night
di QWERTYlulz 30 giugno 2013
1 more definition
A college with a vast population of whites and minority's are a rare commodity.
di !sh0DGr3at 22 ottobre 2009