Nothing really, just an 'M' followed by two 'O''s, finished off with a nice tasty 'F' to make it sound weird.
Despite this, a "moof" is often heard in weird and uncompromising situations, such as when a cow
moos "Moo" whilst eating a bunch of grass to have it sound like a "Moof", where the cow chokes and dies.
Also is a lazy way of saying "Move
*An easily offended cow is eating grass as Jeeb and Foob watch*
Jeeb: "Foob, what do you think cows do all day?"
Foob: "Nothing really. Masturbate
Cow: "MoOF!!!" *Begins contorting and vehemently dying*
Jeeb: "Oh Foob, you fool! The cow must've been one of those easily offended, sensitive ones! Now it's dying!"
Foob: "Ah. Oh well, at least now it's doing something."
Aych *thinks*: 'Ah... Boob's in front of the TV. I'll have to tell him to move over.'
Aych: "Eh Boob... moof over, you cumstain."
Boob: "Yehwha?! Yemma wanna mewah?"
Aych: "Damn, you poof. I said moof over out of my road, you jizzball!"
Boob: "Genna wamma see da 'vision, eh?"
Aych: "Yes, you slack-jawed fool!"
Boob: "Yeh, eye be moofin' out."