wuss out (of something)
slang To withdraw from doing something out of fear, insecurity, or laziness. They were just about to strap me in for the bungee jump, but I wussed out at the last second. Jeff had promised to help, but he wussed out of the project when he realized how much work it would entail. Sorry, guys, Janet's wussing out of the road trip. She says she isn't comfortable being away from home for that long.
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