When more then one person of a special character or group of people that have an extremely high self esteem of themselves, congregate either in public or private place. Freequently at these gatherings and at these scenes the members of the group stroke their cocks rapidly and aggressively whilst discussing and delivering their material and or message. In this scenario it could be classified as a wankertorium.
Brown's Big Wanger is so big that when he turns left it swings like a flail, knocking everyone out of the way. It contains the power of 1000 Wangers combined into one.
Brown's Big Wanger broke my ribs today when he turned to talk to me.