Having the proportions or appearance of a Yeti. Unusually large, obese, hirsute or aesthetically displeasing.
The foul-mannered yetinous woman I had the misfortune to sit next to devoured two Big Macs, fries and Coke, a large packet of crisps and two king-sized Mars Bars in the space of five minutes.
After walking thru my local town centre today, teeming with large obese people, I spied an absolute huge specimen of the female kind, not unlike a Yeti in size and stature.
I wondered how to describe this giant being of Yeti like proportions and concluded that some one yetinous is a person, so obese and huge they are like the legendary Yeti.
And smell just as bad! can also apply this to males as well.
'Look at that yetinous bitch, I bet she can't keep her head out of the fridge.'