resting snitch face

Similar to resting bitch face and resting dick face. Resting snitch face is an indicator that a person has a secret and is trying to hold it back. Signs of resting snitch face include small, half smiles similar to Mona Lisa's. Suffers of resting snitch face may also have bouts of immature giggling as they try to hold back from sharing whatever secret they are holding in.

She tried to keep the secret that she ate her daughter's candy, but the mom's resting snitch face gave her away.