Underbelly (soundtrack)
WordNet
noun
(1) The quality of being weak or unprotected
"The soft underbelly of the Axis"- Winston Churchill
(2) The soft belly or underside of an animal's body
(3) Lower side
"The underbellies of clouds"
WiktionaryText
Noun
- The side which is not normally seen
- The area by the canal is the underbelly of town - not something you'd see in the guidebooks