A really ugly girl or woman usually a bit rough or scary looking with bad or disgusting habits. i.e. fanny scratching public farting bogie flicking etc.
The bogbeast put me off my food with her boot ugly boat race (face) and the continual scratch and sniffing of her own rank muff.
by Bogbeast August 29, 2011
1 more definition
extremely ugly woman resembling something that lives in a swamp
that girl you were with last night was a bog beast
by spook April 15, 2004