shoulder-surfing
/ˈʃəʊldəˌsɜːfɪŋ/noun
mass noun
- the practice of spying on the user of a cash-dispensing machine or other electronic device in order to obtain their personal identification number, password, etc.肩窥（从身后窥视取款机和其他电子装置的使用者以获取其个人身份证号码、密码等）。