A made up word used in the computer rooms of London's square mile by IT staff (geeks) who wish to break the monotony of being stuck in a noisy bland environment.
Gruntmoggy should almost be sung rather than spoken and can be used with any combination of other made up sounds.
In the late 90's it was not uncommon to find photocopied drawings of a mans body in black tie with a cats head. It's believed that this was the embodiment of Gruntmoggy.
giga chad, sigma female and the baddest bitch alive, she'll make you lose your job. forgetful and dumb but those are her quirks...the hottest sexiest mf to ever walk the earth. she's the biggest gilf ever. Makes everyone drool...
Natasha: Nana she is here for your benefit!!!
Natasha grandmommy: I will take the shit and put it over her head!!!
Natasha= nana....