mass noun
1- often derogatory bland soft or semiliquid food such as that suitable for babies or invalids〈常贬〉（婴儿、残疾人吃的）糊; 半流食：
trying to eat a trayful of tasteless pap.
努力去吃满满一盘无味的半流食。
1.1
- derogatory reading matter or entertainment that is worthless or lacking in substance〈贬〉无实际价值（或实质性内容）的作品（或娱乐活动）：
limitless channels serving up an undemanding diet of pap.
播出毫无价值的低劣节目的不计其数的频道。
1.2
- (in Africa and the Caribbean) porridge, usually made with maize meal（非洲、加勒比地区）粥, 玉米粥。
1
- S. African (of food) lacking flavour〈南非〉（食物）难吃的; 无味的。
1.1
- (of a person) lacking physical or emotional strength; feeble（人）孱弱的; 脆弱的。
1.2
- (of an inflatable object) under-inflated; flat（可充气物体）气不足的; 瘪的。
词源
late Middle English: probably from Middle Low German, Middle Dutch pappe, probably based on Latin pappare 'eat'.
- archaic or dialect a woman's breast or nipple〈古或方〉（妇女的）乳房; 乳头。
词源
Middle English: probably of Scandinavian origin, from a base imitative of the sound of sucking.