When two people put their anuses together, one person defecates (preferably a solid log), while the other relaxes to receive the gift into their rectum.

Derived from the "White Elephant" (a crappy gift - pun intended), the Brown Elephant Exchange also illustrates the exchange of items from one elephant trunk to another.

This maneuver is typically only performed by experts.
After Tad and Charles cut their teeth mastering the rusty trombone, they joined the big leagues by completing a successful Brown Elephant Exchange.
by Matt-tastic January 2, 2013
Get the Brown Elephant Exchange mug.