Definitions by Erimus

Polygofair 

having an affair with more than one person

Mary's polygofair is getting out of hand, she's sleeping with seven other people besides her husband.

Polygofair by Erimus March 31, 2009

Monogafair 

when a person in an engagement or marriage has an affair with just one person as opposed to a Polygofair

Dan's mad because he found out his girlfriend, who's married, doesn't want to have a monogafair.

Monogafair by Erimus March 31, 2009