Liz Fenton: Different groups of people have always used hand signals as a way to identify themselves and show respect. The military has a salute, and gangs have, um, gang signs. Hell, even my college sorority had a secret sign you could throw across the room to say hello!

But what about moms? Shouldn't we have a sign to help us communicate with each other? Something that says, "I feel ya, Sista -- my 2-year-old acts like the devil's spawn, too." Or,  "It's OK -- nobody else noticed that breast-milk stain on your shirt."

It could be the universal sign for "I get what you're going through."

We've all been in a situation where we've seen another mom struggling with her kids in a public place. Maybe she's got a fussy baby. Or a tantrum-throwing toddler. Or possibly a tween who's more Britney Spears than Hannah Montana. When I encounter a mom like that, I usually throw a solid nod her way, to let her know not to sweat it too much. But wouldn't it be nice to have an internationally recognized gesture instead?

Like an inverted peace sign.

Or a more feminine version of the chest thump.

Or one of those "rock, paper, scissors" signs.

Anything to show that we are supporting rather than judging when another mom's 4-year-old substitutes every third word with "poop." 

We'll save the dirty looks for the 20-something without kids on the other side of the room. And we'll smile to ourselves, because we know that one day, that beyotch will be in desperate need of a "mommy" sign, too.

Hey, momlogic friends: What do you think would be a good international "mommy" sign?