Transliterates 'Coop' (an English nickname/short form, often clipped from 'Cooper'):
库 for the long 'koo' vowel,
普 for the '-p' final. In Christopher Nolan's
《星际穿越》 (Interstellar, 2014), the protagonist's nickname Coop appears in subtitles as
库普 - the most common reason this rendering shows up in subtitle corpora.