Mel Gibson's Hot New Female 'Friend' Nadia Lanfranconi has 'F' Me Written All Over

Mel Gibson has a brand new female companion -- she's hot ... she's foreign ... and she came thiiis close to showing her vagina in a modeling campaign for a company called "F Me" jeans.

The pretty lady -- who accompanied Mel to The Grove in L.A. this past weekend -- is Nadia Lanfranconi ... an aspiring musician who moved to the U.S. from Italy back in 2007.

Mel and Nadia have been spending a lot of time together recently ... they even went to a sushi dinner earlier this month.

Of course, we all know Mel loves aspiring foreign musicians ... but we're told Mel and Nadia are NOT in a serious dating relationship.

Too bad ... 'cause Nadia showed off the goods during a campaign for "F Me" jeans last year ... a company that makes clothing featuring a waistline that plunges dangerously close to the female reproductive organs.