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1. slang To suddenly become emotional. Mom will flip out when she founds 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 go, or cause to go, crazy. I don't know what happened! I just mentioned that her father had called, and she started flipping out at me!
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.