From The Collaborative International Dictionary of English v.0.48:
Pap \Pap\, n. [Cf. D. pap, G. pappe, both perh. fr. L. papa, pappa, the word with which infants call for food: cf. It. pappa.] 1. A soft food for infants, made of bread boiled or softened in milk or water. [1913 Webster]
2. Hence: Any speech, writing, or idea lacking substance, or of trivial content; oversimplified, trite, or worthless ideas.
Syn: pablum, drivel, twaddle. [PJC]
3. Nourishment or support from official patronage; as, treasury pap. [Colloq. & Contemptuous] [1913 Webster]
4. The pulp of fruit. --Ainsworth. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Pap \Pap\, v. t. To feed with pap. --Beau. & Fl. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Pap \Pap\, n. [Cf. OSw. papp. Cf. Pap soft food.] [1913 Webster] 1. (Anat.) A nipple; a mammilla; a teat. --Dryden. [1913 Webster]
The paps which thou hast sucked. --Luke xi. 27. [1913 Webster]
2. A rounded, nipplelike hill or peak; anything resembling a nipple in shape; a mamelon. --Macaulay. [1913 Webster]