Informal Thin and watery, as tea or soup; insipid.(adjective)
Informal Lacking in strength of character or purpose; ineffective.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "wishy-washy" in a sentence
"Taking four months to make a wishy-washy decision will haunt him."
"Me-thinks there is a lot of wishy-washy “statistics” at play."
"I don't appreciate it when people duck important issues by being wishy-washy, so let me say upfront that I lean toward the belief that hell is a real place for those that reject Jesus."