Definition of yelling:

part of speech: noun

The act of uttering hideous screams; the noise made.

part of speech: adjective / noun

Uttering hideous outcries.

Usage examples:

• The fat, the lean, the long, the short, the ugly; they go into the Good business, for I never knew anyone who could attract attention in the ordinary way to engage in it, and when a woman becomes too fat for society, or too plain to be admired, she goes to yelling that she is better than anybody else, and wants everybody to behave, although they may be behaving all right already. Edgar Watson Howe in "The Mystery of the Locks".

• Some of the riders leaped off the horses and camels; some remained on their saddles, yelling at the top of their voices. Henryk Sienkiewicz in "In Desert and Wilderness".