gerbil rocket 

1. fuck someone in the ass
2. insert a toilet paper tube into their loose asshole
3. insert gerbil into tube
4. light a match at the end of the tube to force gerbil farther up inside asshole
5. remove tube and enjoy the wriggling of a small to medium sized animal inside your anus
6.good luck getting it out

Last night after a felching session, Bill gave Tom a gerbil rocket

gerbil rocket by Jim McFunk May 10, 2006

gerbil rocket 

The act of Gerbiling,and,then,trying to get the gerbil back out with a naked flame,to find that your ''natural gases'' are flammable.

''Oh shit,that Hamster Just Got Gerbil Rocketed''

gerbil rocket by zigger January 1, 2008