zipped ones lips (adjective) closemouthed: silent, reserved
Sinonime: buttoned up, clammed up,
close, close-lipped, dummied up, have tight chops, hush-hush, on the Q. T.,
quiet,
reticent,
sedate,
taciturn, tight-lipped, uncommunicative, zipped one's lips
Antonime: chatty,
open,
talkative