A relationship of trust where a partner is dedicated to another single partner, or at least apparently to the extent of being in the same zip code, or how bored some losers who can't control themselves get.
Annika's boyfriend wasn't good at being monogamous, but his attempts to cheat weren't too spectacular either.
by Mmmkay December 14, 2004
The act of being committed to only one sexual partner.
Once the married MILF saw the handsome former coach, she knew she didn't want be monogamous with her husband anymore. She went with him to the no-tell motel and they fucked for hours. The coach taught her so many new things, like the Cleveland Steamer and the Oral Rottenbacher. She couldn't get enough of his schlawg, and sucked it dry.
by HoodedBandit March 06, 2014