'Vu" is a word in french, was often used on homework assignments in lebanese french schools to mean "noted" or "reviewed", particularly on homework assignments which did not require any grading.  However, this word got into the lebanese day to day young population slang in the end of the 90's, to express agreement to a subject, understanding or simply noting of a remark.  If you are a fan of slang language, "Vu" is in fact very close to "Mesh Ghalat".

 Sample conversation:

Person 1: "What do you say we go to the beach today?"

Person 2: "Vu, great idea"