From [link|http://www.merriam-webster.com|http://www.merriam-webster.com]
Main Entry: psy\ufffdchop\ufffda\ufffdthy
Pronunciation: sI-'k\ufffd-p&-thE
Function: noun
Etymology: International Scientific Vocabulary
Date: 1847
: mental disorder; especially : extreme mental disorder marked usually by egocentric and antisocial activity