1. To act, usually en masse, hurriedly or on an impulse:
2. To cause a group or mass of people to act on an impulse or hurriedly and impulsively
3. To cause to run in panic:
4. To run away in a stampede.

ETYM Spanish estampida (in America) a stampede, estampido a crackling, akin to estampar to stamp, of German origin. Related to Stamp.
1. A headlong rush of people on a common impulse.
2. A wild headlong rush of frightened animals (horses or cattle).