WordWeb Online

1. Exclamation used to acknowledge a mistake or accident
   "Whoops, the ball slipped out of my hands"; "'Whoops-a-daisy,' she said that first day, stooping to recover the crepe";
   - oops, whoops-a-daisy [informal], oops-a-daisy [informal], whoopsie [informal]

1. A loud hooting cry of exultation or excitement

1. Cough spasmodically
   "The patient with emphysema is whooping all day";
   - hack
    
2. Shout, as if with joy or enthusiasm
   "The children whooped when they were led to the picnic table"

Sounds like: h

Type of: call, cough, cry, holler [informal], hollo [non-standard], outcry, scream, shout, shout out, squall, vociferation, yell

Encyclopedia: Whoops, I'm an Indian!