Today, the wisdom of Urban Dictionary

YESTERGAY:

a gay male now in a heterosexual relationship or marriage. Not the same as ex-gay, which is someone who seeks a religious conversion to abandon homosexuality.

Ex: After years of bad relationships with men, he finally found a woman he loved enough to want to marry. He is a YESTERGAY
 
SANTORUM ((just for you, Rick!):
The sometimes frothy, usually slimy, amalgam of lubricant, stray fecal matter, and ejaculate that leaks out of the receiving partner’s anus after a session of anal intercourse. Named, by popular demand and usage, after legislator Rick Santorum because of his homophobic political statements.