The hadeeth is authentic as it was reported by Bukhari and Muslim in the Saheeh.

It means that there will come a time when a man from Abyssinia will come and demolish the Ka’abah.

Narrated Abu Huraira (Radi-Allahu ‘anhu): Allah’s Apostle (Sallallahu ‘Alaihi Wa Sallam) said, “DhusSuwaiqatain (the thin legged man) from Ethiopia will demolish the Ka’ba.” pls explain jazak Allahu khairan!