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1.
The act in which several men try to insert thier penis' into one womans anus. There may be as many penis' as can be rammed up there, however is blood occurs that might be enough...
Friends may be involved but this may be wierd...
"dude that girl had a massive Traffic Jam last night... i heard there was 8!"

or

"The Traffic Jam i was in last night was epic!"
by ranfky March 03, 2010