wall party

Best definition
wall party
Where a group of people decide to have a prolonged, often humorous conversation on Facebook, but conduct it in the comments of a random person’s status update. The amusement and general lack of regard for others is behavior synonymous with parties, as is the person deleting their update and thus shutting down the wall party. This works best when there is a mutual Facebook friend, but not an actual friend in the group.
John Smith: Anyone know what time the game starts?

2 comments from friends of John Smith

A series of comments from a small group of friends disregarding John Smith’s question but engaging in an internal conversation about random, often vulgar topics, but in a public forum so others can see and be offended, amused.

John Smith: What the hell!!! So many notifications!!!

A guy: WALL PARTY!!!!