Using your mom (or the mom of a friend) as your "wingman" to pick up a girl at the bar. It works because you seem nice for taking a mom out to show her a nice time and your intentions could be nothing but good.
Joe: Hey did you bring a girl home last night I thought you were hanging out with your friend's mom while she was in town?
Phillip: Yeah, we went to a bar downtown and she was a fantastic wing-mom. The girl I was talking to thought it was sweet that I was showing my friend's mom around town.
Noun: A mother in which will help her son get laid, usually at a bar or a large gathering. This method of bringing along a wingmom is much more rewarding because it comes off to women as a man being sensitive and a family-man rather than a future one-night stand;
exactly like a wingman, but it's your mom.
"I haven't gotten laid in forever. Luckily, I'm going out for some beers with my wingmom tonight."
Another mother that you bring with you to a party, event, or destination for when you want a break from your own motherly-duties.
Your best friend, who is also a mother, who watches out for your kid when you are otherwise indisposed.
I was chasing my five-year old daughter around the indoor waterpark but thankfully, my Wing Mom took over so I could hit the Tiki Bar.
As I was walking back from the port-o-potty at the park, I saw my Wing Mom pick my son up from the sandbox and remove him from the melee that had broken out among the three year olds.