I'm sorry that Gjallarhorn somehow equated to or was an extension of your ego.
[spoiler]I'm not. You're a snowflake.[/spoiler]
English
-
Neither term is exclusive to Destiny. "Special Snowflake" refers to anyone who sees themselves as exceptionally unique for no real reason - in this case it's those who've received Ghorn via a raid or other activity. Snowflakes often feel that this delusion warrants exclusivity or special treatment. Hence why some, not all, are opposed to Xur selling gjallarhorn. It jeapordises their view of themselves and how it makes them feel. Salty is essentially just another term for irritated or snappy. But there's a lot more to it.