The sound effects either you or new moms make to entertain yourself while eating food.
Mom: "Here comes the race car Johnny! Vrrrrrooooommmmm!"
Older son: "Mom will you please stop using those annoying sound eatfects!"
Kate: "I couldn't consentrate on how hot Josh is on our date because he kept making these friggin' loud sound eatfects. It was like so weird!"