What's the difference between shithouse and thunderbox?

Shithouse

Definition:

Example Sentences:

(1) The model I use for my paintings is a surfer guy who's built like a brick shithouse."
(2) Alyokhina responded by quoting the president and his spokesman: "That is no more indecent than your Vladimir Vladimirovich [Putin]'s statements about 'wasting our enemies in the shithouse' or 'smearing the livers of protesters on the pavement'."