To be in a dazed, semiconscious, crazy, or love-stricken state. Believed to be caused by a phase of the moon.
by SumaDemDer January 11, 2013
We're all just a little moonstruck
by 5secondsofmuke March 05, 2015
a phenomenon of a stupid man who totally loses his mind and starts acting dumb whenever he sees hot chicks. even a man of ability falls into this category. so almost every man is a moonstruck dog.
by lolito March 25, 2005