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1. slang To suddenly express anger or excitement in a very visible way. Mom will flip out when she finds out we broke her vase! When Jenny saw that we'd rented a pony for her birthday party, she totally flipped out.
2. slang To become emotionally unstable or unmoored. I think I flipped out a bit after college because I had no direction in my life. After the divorce, Pete flipped out and started getting into some weird stuff.
Sl. to lose control of oneself. After a sleepless night, Wally simply flipped out. I felt like I was going to flip out from the steady dripping of the faucet.
1. To go crazy: The neighbors flipped out when my oak tree crashed onto their property.
2. To react strongly and especially enthusiastically; flip: When the broker showed me the spacious new apartment, I flipped out. The customer flipped out over the luxurious black convertible.
in. to lose control of oneself; to go crazy. Wow, I almost flipped out when I heard about it.