v. To injure the brain of, usually temporarily, by violent impact.
v. To force to do something, or give up something, by intimidation; to coerce.
the GNU version of the Collaborative International Dictionary of English
v. To shake or agitate.
v. To force (a person) to do something, or give up something, by intimidation; to coerce.
The Century Dictionary and Cyclopedia
To shake or agitate.
To force by threats to do something, especially to surrender or dispose of something of value; intimidate into a course of action; coerce: as, he was concussed into signing the document.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. shake violently
v. injure the brain; sustain a concussion
Word Usage
"Now they are being portrayed as evil, soulless dudes who don't care if they concuss themselves or give concussions to others."