The word "wifey" is a slang term used to refer to a woman who is someone's girlfriend or wife. It is often used to express affection, endearment, or to show that the person is important in their life. Full definition
We've had similar problems with a Pineapple - Habanero Salsa that we've made, that was perfect the first time, and way too hot for wifey the second time. (thetasteplace.com)
Played some couch co-op with wifey last night... Absolutely loving this game. (thesixthaxis.com)