The dunglish version of the word 'beterschap', which is wished to someone who is sick to get better soon.
Commonly used in the Amsterdam metropolitan area, in the Netherlands, where the spoken english has a lot of influences from dutch.
'John has been sick for three days now.'
'Poor man, wish him bettership from me, will you?'
by Oxvamiro October 13, 2018
Get the bettership mug.