Learning to Beatbox? Here is the Human Beatbox Sound Archive entry for the Outward K Snare.
Name: Outward K Snare
Family: K Based Snares (K)
Description:This sound is made by brining the tongue to the soft palate, creating pressure behind them, then pushing out a small burst of air. It is similar to the sound made by a "k" or hard "c" in English. There are two main variations to how this sound is made. It can be a plosive, meaning that it stops the airflow out of the lungs, then suddenly releases it, or it can be an ejective, meaning that does not use airflow from the lungs, it simply uses pressure built up in the mouth by raising the glottis.
Other Links: About the Human Beatbox Archives and Notation System