Frodo

Originally the name of J.R.R. Tolkien's Hobbit protagonist in the Lord of the Rings trilogy.

Now it is a name given to the area just above and around the hip bones. Based off of the supposed height of Hobbits (about where their heads would be if they were standing next to someone) from the Lord of the Rings. Often used when said area has been injured due to a blow, stab, or gun wound.

Oh, dude she just got kicked in the Frodo!

When I crashed on my bike I got a really bad gash along my Frodo.

I can't believe he took a hit to the Frodo and is still standing!