rabbit warren
nounEtymology From rabbit + warren (“nest or burrow”).
1
An underground system of interconnected tunnels occupied by rabbits.
- Meronym: rabbit hole (precisely meronymous)
2
A confusingly labyrinthine environment.
- "Everybody knows the publicly visible areas. But in the basement, which is a rabbit warren of ageing kit, we need to do something serious. [...]."2020 November 18, Mike Brown tells Paul Stephen, “I wasn't going to let the Mayor down”, in Rail, page 45: