A 'many', can be anything which will eventually or will soon be positive. A 'many' is used in connection with another word(adj) for example 'booze', 'munch', 'chat', 'sex/shag/bone'. This word is often used when its users are drunk/or are trying to be cool. This often leads to the opposite effect which is highly undesirable
Boy: "Am hungry"
Girl: "mm, mee too :( "
Boy: "want to go for something to eat, marcans?"
Girl: "aye, i would like some chips,"
Boy: "fine munch"