A chunky (and usually ugly) female who often gets lucky when some poor sod is too drunk to think straight and decides to 'do her a favour' by giving her a shag. Sort of like a moped - fun to ride until someone sees you!
Oofnut can be used to refer to a person or a thing. Can be used in any type of way. Oofnut can be used to replace an utterly stupid, funny, goofy, or mad person.
Oofnoursmous - such an enormous Oof that it cannot be expressed within the normal, weak boundaries of the typical Oof. This is the Oof you use when Oof is not enough to express how you feel. This is the ultimate Oof.
L- "My grandma died.”
N- “Oh I'm so sorry.”
L- “She left everything to her cat instead of me.”
N- “That is an oofnourmous loss my friend.”