Electrical shunt -- relating to a small resistance usually used to sense current. This is what your multimeter uses to measure current. This tag does not cover magnetic shunts.

An electrical shunt is a very (comparatively) small resistance, the main purpose of which is to sense the current flowing through it, by sensing the voltage on a fixed resistance. Often used in power electronics as part of regulation of the output voltage or current, it can also be used to merely "read" the current for recording purposes, as in what your multimeter uses to sense current.

This tag is intended for only electrical shunts, and specifically does not relate to magnetic shunts.