love rat

American  

[luhv rat] / ˈlʌv ˌræt /

noun

Chiefly British Slang.

1. a sexually unfaithful man, especially one whose infidelity involves more than one affair.

   She’s a lot less trusting of men since her second husband turned out to be as much of a love rat as her first.

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Etymology

Origin of love rat

First recorded in 1990–95

Example Sentences

At the time, the British tabloids called him a "love rat" after he was pictured embracing the woman appointed to a role to scrutinise his department.

From Reuters

The couple who won – the aptronymic resident love rat, Grant Crapp, and his long-suffering girlfriend, Tayla Damir – would not have survived the first dumping in Britain.

From The Guardian

However, they stressed the results were modest, and said people should be wary of deciding whether someone is a love rat based on impressions of facial features alone.

From The Guardian

I shall simply add that, far from being ‘the love rat who left Seraphina Picquery heartbroken,’ the President made it clear that if I didn’t leave New York voluntarily and speedily, she would take drastic steps to eject me.It is true that I was the first person ever to capture Gellert Grindelwald and also true that Albus Dumbledore was something more than a schoolteacher to me.

From Literature

A student has caused a nationwide hunt for a "love rat" after overhearing a conversation on a train.

From BBC