Momtini is a new word that has been used for moms who gather while their kids have playdates, with the moms enjoying a nice glass of wine. These afternoon groups were apparently named by some bloggers. There was even a story about them in the NY Times. (If you wish to read the article, you have to register, though it's free.)
"Momtini" on Google's advanced article archive gets 27 hits going back to 1951
Actually, some are earlier, but only one of the 27 seems relevant (many appear to be op-scan misreadings of the name "Montini") - that one being from The Detroit News of April 19, 2005:
... she's gotten revenue from advertisers and T-shirt and mug sales featuring her "momtini" logo: a baby pacifier in a martini glass.
That's only in the news archives, however. The word appears no less that 7 times (threedistinctstories) the google-news reports over just the last month. We may have picked up the first rumblings of a neologism.
That would be a great usage for teenage parenting, Jerry.
As mommies are sipping martinis, Their kids all pretend they're houdinis. They handcuff each other And cry out "Where's MOTHER?!" She's off having fun in momtinis!
Spelling: OED shows it as a term requiring capitalization, which is clearly inconsistent with actual usage.
Meaning: Both OED and AHD define it as a cocktail made of gin (or vodka) and dry vermouth. I understand this to be quite out-of-date; vermouth is now almost universally omitted.
Etymology: There are two theories: (1) from the city of Martinez, California, or (2) from the name of Martini and Rossi, Italian manufacturers of vermouth. OED's earliest cite, dated 1884, refers to the "Martinez cocktail".