noun Informal.

a timid, easily frightened person: often used by children.

Origin of fraidy-cat

1905–10; fraid (aphetic form of afraid) + -y1
Also called scaredy-cat. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Word Origin and History for fraidy-cat

"coward," by 1871, American English slang, from 'fraid, childish or dialectal (African, West Indies) pronunciation of afraid (by 1816), + cat.

Online Etymology Dictionary, © 2010 Douglas Harper