A person who does not listen properly.
I had to explain myself repetatively to the whatter.
A person who chitter chatters pointlessy. Old Scottish.
When ance their tongues gang whitter-whatter
(slur) A person who identifies as 'genderwhat', or unable to understand the concept of gender to to neurodivergance or general stupidity
That person has got to be a whatter, they wouldn't know gender if they were slapped in the face by a hairy ballsack.
the definition 'whatter' is used when your questioning but also saying it in a surprised matter.
for example, "Whatter just happend!"