Derogatory name for a basic five-storied apartment building built between 1956 and 1973 while Khrushchev was in power, usually called Хрущёвка. Here the name is combined with трущоба (slum).
Судя по высоте потолка, ещё и хрущоба…
Judging from the ceiling height it must also be a Khrushchev slum…
(DEskvajr @ twitter.com, 05/2022)