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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Jibber-jabbers:

PIRATES: Jibber-jabbers
TALKSNONSENSE: Jibber-jabbers
YAPS: Jibber-jabbers
SHH: Quit your jibber-jabber!
YAKS: Jibber-jabbers