Apple
On Apple devices, depicts a yellow face with wavy lines around it, symbolizing trembling from fear, anxiety, or being shaken by strong emotions.
Google
Google's version shows a similar trembling face, often used to convey being scared, overwhelmed, or physically shaking due to cold or excitement.
Twitter
Twitter displays the shivering face to represent someone quivering with fear, nerves, or intense feelings, often in response to stressful or surprising situations.
Unicode Official
The Unicode Consortium defines as the 'Shaking Face' emoji, intended to depict a person whose face is shaking due to fear, cold, excitement, or other strong emotions.