A summer love but within the realms of platonic friendship. A close, fun friendship that is great for a season but soon evaporates into the cloud of memories that is, "what once was".
A flashfriend is someone you spend every day and night with for all of 3-6 months; hanging out, watching movies, talking about every subject known to man, etc... As soon as soon as the above mentioned time period ends, they disappear. You simply wave to one another from across the hall in passing and wonder what happened.
by werenotemoanymore March 07, 2010