It means no head, no leader, no caudillo. Descabezado. Movement without leader.
(((acephalous - concerns al1) fetus without head-2) to certain heretics of the 5th century who did not recognize head-3) certain mollusks whose head is indistinguishable from the body -
ACEFALO:ACEFALIA, HEADLESS.WITHOUT DIRECTION.GROUP, ASSOCIATION, COMMUNITY WITHOUT DIRECTION.