To reverberate one's larynx in quick successive intervals from the mid central vowel sound of ə to the open-mid central vowel sound ɜ in order to poorly, but humorously, imitate a very generalized Asian accent. This voice control technique is almost exclusively used in the phonation of the letter 'o' in the word "somebody" usually accompanied by greatly extending the duration of the sound.
It was popularized and mastered by Russell Johnson of Ownage Pranks with his Vietnamese character Rang Nah Hah.
Rang Nah Hah: Duh-Hello?
Crisis Hotline Operator: This is the crisis hotline, how may I help you?
Rang Nah Hah: Okai hai, mai name is Rang Nah Hah Bilman Goy Umdid Ahmgeh and mai husbin he bit me, he bit my ass so likada suuuuuuuuummmmmmmmmbOOooOoOooOoooOoOooooOOooooooooOOodiiiiiiiii.
Crisis Hotline Operator: I see your Vietnamesewith that amazing quiggle control.