In the Greek system in American colleges, it refers specifically to a necklace bearing a fraternity's or sorority's letters. An accepted gift of a lavalier, called lavaliering, indicates a romantic commitment that may develop into a long term engagement, and marriage.

Every sorority girls dream!!!

having been drawn upon with liquid energy from a lavalier, the letters of his brotherhood.

one who practices any of the four levels of lavaliering, (the act of writing your greek letters on a lavaliese with your liquid energy: see also brand, branding, greeked, greeking); a lavalier is inherently an energy giver, (see also liquid energy, friction generator)

The four lavalier levels are:
Apprentice
Journeyman
Artisan
Master

What LL are you?

To put your letters on a girl. While this normally involves the impermanent, like a necklace, and symbolizes pre-pre-marriage, (see dating), the lavalier is a time honored tradition with application outside of jewelry, (see brand, branding, greeked, greeking).
Similar to branding, the apprentice, (beginner, novice), to lavaliering uses any digit, (fingers or toes), immediately available to recent ejaculate and draws one's letters on the lavaliese, (girl to be lavaliered or girl receiving lavaliering). Practice enhances speed and potential for success: success elevates practitioners.
Journeyman: The lavalier uses his lesser mind, (dick), instead of digits to draw his letters on lavaliese(s). Success, (difficult, especially on a girl prepared for tomfoolery), prepares one for artisan level lavaliering.
The artisan uses no hands, only epic, full body engagement of drawing upon the lavaliese: fantastically difficult, this is the last step before mastery.
Mastery: the lavaliese, knowledgeable of intent and willing, (who must be sober for lavalier to be considered a master), takes your love truncheon and draws your letters herself...on herself...on behalf of the now master lavalier.
The master lavalier can lavalier any girl at any of the 4 levels of lavaliering, and is likely to have a chair position in any brotherhood.

it's an Italian exclamation used to say hi to a person from Naples, it's a must say thing if you're in Naples.

Lavalis is an amazing runner although he doesn’t play any sports he is still athletic. He is light skinned with freckles and a fro. Don’t forget his pretty eyes. A lot of girls like him but not the one he’s interested in. He might look skinny but don’t underestimate him cause he is strong and knows how to fight. He is also very tall and knows how to dance. Can be shy when you meet him but opens up very quickly. He is also funny. Very funny.