oyster fest 

An event comprising primarily of Women. The opposite of a sausage fest

Yo, this boy band concert is a oyster fest

oyster fest by BackupBrain June 13, 2008

Oysterfest 

An area in which there occurs an abundance of females in relation to males. It is the opposite of the popular term "Sausagefest".

"My girlfriend is making me attend a local women's rights convention... it's going to be a total oysterfest."

Oysterfest by Dave August 12, 2008