I could understand
frequenting an opium DEN
The Big Bang Theory Season 5, Episode 10
but you're here,
in the fucking lion's DEN.
Money Heist Season 3, Episode 7
So we walk into the lion's DEN.
Game of Thrones Season 7, Episode 6
Even the little DEN of iniquity
he keeps for his meth-hag girlfriend.
Breaking Bad Season 2, Episode 2
It's going to be expensive
to venture into the lion's DEN, huh?
Money Heist Season 3, Episode 2