To shoot out or forward; to project beyond the main body.

ETYM Old Eng. piken: cf. French piquer to pierce, prick, Eng. pique. Related to Peak.
(Homonym: peak, pique).
1. To look furtively; SYN. peep.
2. To peer through a crack or hole or from a place of concealment — often used with in or out.
3. To take a brief look; glance.

1. To cry, as a chicken hatching or newly hatched; to chirp; to cheep.
2. To begin to appear; to look forth from concealment; to make the first appearance.
3. To utter a feeble shrill sound as of a bird newly hatched; cheep
4. To utter the slightest sound

To bulge outward; SYN. pop, pop out, bulge, bulge out, bug out, come out.