If you have an orgy of presents or snacks or even new ideas, you have so many it's almost obscene. In this figurative use, orgy means a lot of.
The word orgy comes from the Greek orgia meaning "secret rites" which referred to the secret rites of Dionysus, the Greek god of wine and love-making. An orgy is a gathering of a number of people that involves sex and drinking. As well as the meaning of many things, you can use the word orgy to refer to any intense activity. Before school starts in the fall, most kids get to go on an orgy of shopping for cloths and school supplies.
