look up any word, like blumpkin:

1 definition by Tritonof the sun!

 
1.
The small to large portion of skin on your lower back that is exposed when the shirt does not meet the pants. caused by too short a shirt, low pants, bending over or a combination of the three.
"oh man did you see the Dilly Bar on that girl when she bent down to pick up her pencil??"

or
"oh my gosh jen get a belt! your dilly bar is showing"
by Tritonof the sun! September 27, 2009