IPA: /ˈwɛltʃər/
KK: /ˈwɛltʃər/
A person from Wales or someone who has Welsh ancestry.
He is a welcher who takes pride in his Welsh heritage.
The word 'welcher' originates from Middle English 'welcher', which is a variant of 'welk', meaning to wither or fade. It is used in dialects to refer to a person who is a coward or a weakling.
Think of someone who 'withers' or 'fades' in the face of challenge — that's why 'welcher' refers to a coward.