Come The Mong Edit Meaning

1.

Petulant, sulky, depressed. monging n. being under the influence of depressants or other drugs (especially for recreational use); idling, relaxing, or vegetating (especially due to drugs or alcohol or their after-effects); vegging out, chilling out, or chillaxing. Also, monged out, adj., feeling dulled, sluggish, or drugged. Related: chicken-in-the-basket, waps, smurfing, robotripping, English, United Kingdom, Drugs. Slang - used mainly in Australia and New Zealand - deer culling idiom

"Don't come the mong" - meaning "don't look all upset at me like that".

See misery, miserable, petulant, smurfing, robotripping