What is Big Funny?
1.
To be unable to write how funny something is and to have it expressed as text.
Can be used with sarcastic tone. Similar to
Person 1: ***tells joke - not a very funny joke, but a joke!***
Person 2: Oh... big funny!
---OR---
Person 1: ***tells story of something silly that they did or saw***
Person 2: Haha, big funny!
See