A punctuation symbol created to reduce unnecessary overusage of exclamation points in texts, posts, etc. The proclamation mark is written as a forward slash and period:
/.
Used for things that are somewhat funny but not hilarious where a period is not happy enough but an exclamation point is too much.
"Stop overusing exclamation points already. Give the proclamation mark a try/."
"Have a great day/."
"What a douche(proclamation mark)/."
"Your mom's looking smokin hot today (proclamation mark)/."
When a guy who always denied ever jacking off first proclaims to their friends that they indeed do masterbate. Usually admitted after days, months and years of questioning and teasing.
Krieg- "You missed it last night. Brett finally caved."