A shenpa is a Tibetan word for an attachment, an urge, a tension, a tightening in the body/mind.

"Generally speaking, however, we don't catch it at that level of just open space closing down. You're open-hearted, open-minded, and then... erkk. Right along with the hooked quality, or the tension, or the shutting down, whatever... I experience it, at the most subtle level, as a sort of tensing. Then you can feel yourself sort of withdrawing and actually not wanting to be in that place. " - Pema Chodron