An ancient sexual perversion so disgusting and repugnant to both men and women that it is rarely openly discussed. As a result it is much misunderstood and feared by both sexes.
I took that Spanish girl home from the bar last night and she asked me to doublebag her. As soon as she went to the toilet I sneaked off.
To use two condoms instead of one while fucking. Although this sounds twice as good, it causes friction.
Dayumm woman, I ain't need to doublebag with you, it's goin in your mouth.