Tip-to-tip
Example:
Steve: *tries to squeeze through the crowd
Al: *walks towards Steve
Steve and Al: *touch dicks on their way through
Steve: Ah, shit. We just went tip-to-tip
Steve: *tries to squeeze through the crowd
Al: *walks towards Steve
Steve and Al: *touch dicks on their way through
Steve: Ah, shit. We just went tip-to-tip