A chick that is so ugly that you not only have to put a bag over her head before you fuck her, you put a bag over your own head as insurance in case her bag comes off.
a prospectivesexual partner, who, in order to enter a sexual encounter with them, you must not only put a bag over their head, but over your own in case their's falls off.
The name for getting two consecutive strikes in bowling. Usually called a "double", the term two-bagger has risen in prominence. It is based on the idea of the "four-bagger", but is used for 2 strikes instead of four.