Banterogenous

A consumable substance which causes banter to occur between two or more people.
-or-
A person or people who have banterous intentions or are inclined to cause banter between one another.

"This weed is particularly 'banterogenous'."
-or-
"Drinking large quantities of alcohol makes me and the lads extremely 'banterogenous'."

by SpazyMcGee February 8, 2015