All of a sudden

/ˌɔl əv ə ˈsʌdən/ adv, slang

adv, slang ·Moderate ·College level

Definitions

Adverb
  1. 1
    Suddenly, quickly, without warning. colloquial, not-comparable

    "All of a sudden I felt very hot and tired."

Adverb
  1. 1
    suddenly wordnet
  2. 2
    quickly and without warning wordnet
  3. 3
    happening unexpectedly wordnet
  4. 4
    on impulse; without premeditation wordnet

Example

More examples

"All of a sudden I felt very hot and tired."