go through the floor

US /ɡoʊ θruː ðə flɔr/
UK /ɡoʊ θruː ðə flɔr/
"go through the floor" picture
1.

merosot tajam, jatuh drastis

to fall to a very low level; to decrease very quickly

:
Sales of the product went through the floor after the scandal.
Penjualan produk merosot tajam setelah skandal itu.
House prices in the area have gone through the floor.
Harga rumah di daerah itu merosot tajam.