n. freak means unusual, odd, bizarre, consequently to freak out (v.) means to lose your "normal" usual self and go crazy, either due to extreme fear, anger or excitement.
adj. one who is panicked,
scared shitless, crazed, psycho, stoned,
psyched,
fired up.
1. When the plane started shaking she freaked out.
2.
Terry freaked out when he saw his
sister's dog
peeing on his bed for the third time.
2. Jane freaked out when she saw the gorgeous ride her dad bought her for her birthday.
3. He is freaked out about the races tonight.