A serious case of mental confusion that arises when a fashionista decides to wear normal clothes for once, thus making normal clothes wearer's minds go crazy.
Whoa! I just saw Mary-Kate and Ashley Olsen in normal clothes and experienced mental whiplash!
The mental effect of realizing that a basic assumption of your entire life was wrong from day one, usually resulting from a totally new thought, comment, or experience that flies in the face of everything you currently know.
See also; mindfuck.
Mental whiplash is the psychological equivalent maxing out your revs in Third, and then accidentally shifting into Reverse instead of High.
The feeling one gets after a painful sudden realization that something they once thought is not true.
"I had total mental whiplash when I found out it was Monday. I had thought it was Friday all day!"
"I thought I saw Susie at the mall so I gave her a hug, but she turned around and it turned out that it was just some random dude. Absolute mental whiplash."
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."