The definition of ticky tacky is people or things that are tasteless, low quality and the same as others.(adjective)
An example of ticky tacky is a poorly built suburban tract housing development.
See ticky tacky in Webster's New World College Dictionary
Origin: orig., cheap building materials, as for tract houses < redupl. of tacky: popularized in “Little Boxes” (1962), song by M. Reynolds (1900-78), U.S. songwriter
See ticky tacky in American Heritage Dictionary 4
Origin: Reduplication of tacky2.