A style of speech, vocabulary or pronunciation of (supposedly) English - that is otherwise unintelligible, as if spoken by a mong- usually occurring as a result of severe substance abuse.
The guy was fucked. I couldn't understand a word he said - he was speaking complete monglish.
by Nick Vasey March 10, 2004
1 more definition
English spoken by complete mongs which comes out in the form of complete gibberish.
His grasp of monglish was second to none!
by tronski August 19, 2005