the term "mrph" is commonly used to replace a sigh, but can be used as a replacement for a lot of other expressive terms such as: "ugh" or "hmph"
"Mrph" can also be used with little to no meaning other than to just be a cute sound effect or and angry response, sometimes even an exaggerated whine. Really, its all about HOW you say it.
A black man in his 30s who makes videos on youtube. His videos often include him wearing fake teeth, lipstick, purses or panties on his head. He also speaks with a Jamaican accent and is extremely obese to the point of having large breasts. Many of his videos appear to be filmed while under the influence of some sort of drug. His catchphrases include "shnaker shnaw", "coconut bam bam" and "collymenta colly". He also often refers to people as pigshit, damn jackasses and stink.