Mongospastic

Mongospastic (adjective, offensive, slang)

Pronunciation: /mɒŋɡoʊˈspæstɪk/

Definition:
A derogatory term to describe someone acting retarded and making really dumb and weird moves.
A beautiful combo of "mongoloid" and "spastic".

That guy is acting really weird and he's not helping the team, what a mongospastic!