The mucky-mucks were talking loudly in the meeting room but never listened to the junior staff.

mucky-mucks 是一个俚语，由 mucky（肮脏的）和 mucks（污物）组合而成，在口语中用来讽刺性地指代"大人物"或"高层人士"，带有贬义色彩，暗示这些人虽然地位高但可能品行不端。