1) A sound of anguish made when embarrassed by friends.
2) A sound made when there is nothing else to say.
3) Quickest way out of an uncomfortable question
1) Julia: So Irene, I hear you have afriiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiind.
Irene: *upset dinosaur noise*
Julia: So you do like him!
Irene: *upset dinosaur noise*
2) When Isabelle asked Yagmur how he did on Nolan's test, he responded with an upset dinosaur noise.
3) Mother: Margaret, are you and Dylan having sex?
Margaret: *upset dinosaur noise*
Mother: Answer my question Margaret.