v.1. To grow large; bulge outward: Your eyes will bug out when you see my new car.
2. Slang To leave some place, usually in a hurry: They made it clear they didn't want me there, so I bugged out.
3. Slang To be frightened or confused: I'm afraid of the dark, so I was bugging out during the blackout.
4. Slang To cause someone to be frightened or confused: The thought of surgery bugs me out.