shushing

Shush, the index finger of one hand is extended and placed vertically in front of the lips, with the remaining fingers curled toward the palm with the thumb forming a fist; used to demand or request silence from those to whom it is directed. Can be silent or accompanied by an audible "Sssh!" sound which alone has the same meaning.

See also

• finger to mouth

This tag implicates finger_to_mouth (learn more).