Irish slang for a mean, contemptible, or thoroughly unpleasant person. A louser is someone who lets others down, cheats, or acts selfishly — the kind of person who'd steal your last euro and then blame you for it. Widely used across Ireland as a casual but pointed insult, it carries real sting without crossing into outright profanity. Think of a louser as the guy who never buys a round at the pub but always drinks yours.
Don't trust him with the float — he's a complete louser and everyone on the street knows it.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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(Ireland, slang) A mean or contemptible person.
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