A word for something amazing. Think of the first time you ever (willingly) had sex - that was a Magnum experience. Or the first time you ever had your favorite food. Or the first time you ever punched someone in the face. The first time you won something. All Magnum experiences.
Not a word to be taken lightly - a Magnum experience can define a persons life.
Also can be used to describe an item, or as an emotion - feeling Magnum. All are positive. In no situation is Magnum ever negative.
Oh man, Jill gave me a handy in the backseat of Jacks car last night while he was driving, and he had no clue!
Thats fucking Magnum, man.