Definition of "freak out" [freak out]

• To react (or cause to react) with extreme anger or fear to something to the extent that one loses one's composure or behaves irrationally; originally, to suffer an unexpected and severe bad reaction from the recreational use of a psychotropic - usually hallucinogenic - drug, (verb)
• To scare someone. (verb)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "You ain’t gonna go to my aunt’s house to freak out an eightysomething-year-old woman, and I’m not helping you blow up innocent people here for twelve strands of light or whatever you were babbling about!"
• "I tried not to freak out too badly, even though under Stephanie Pierce’s name it said we needed to buy ten spiral notebooks."
• "And the surprise glimpse of well-filled panties can freak out an army."