This is the 14140th most frequent Turkish word.
muş
"Muş" is a verb suffix in Turkish indicating hearsay or indirect information, translated as "apparently" or "reportedly."
The suffix -miş is used here as the past perfect tense marker, indicating that this is information the speaker has learned indirectly.
Ahmet dün okula gitmiş.
Ahmet went to school yesterday.
Here, -miş conveys indirect knowledge or hearsay information, implying the speaker learned this from someone or something else.
Hava çok güzelmiş.
The weather was very nice.
In this case, -miş is used to imply surprise or realization about the person's skill based on newly learned information.