Lyric discussion by jasjb 

I was around in those days, looking forward to each next Beatles' record. But what seems to be unknown on this forum is that "heavy" was used in a different context then. It meant, like "cool" and "deep" together. It meant, hey, this is not shallow or casual or petty, it's heavy and strong. So, songs were "heavy" with both cool and deep meanings. If someone was heavy, they were deep, had lots of levels and were not easy to fathom. But the song is most likely about Yoko, who was extremely intellectual and an international person of note. John had very strong feelings towards her. He dug her. Deeply, heavily. He still does (ooh - now that's heavy!)

yes, the heavy part was about his deep relationship with Yoko Ono. I also think it sorta means that it was complicated too, since it was deep.

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