There’s one born every minute
Definition 1 of 1
Pro Tip 1/3Sarcasm Alert
This phrase is often used sarcastically to mock someone's gullibility, not to genuinely inform. 
She bought the 'magic' beans without question—there's one born every minute.
Pro Tip 2/3Cultural Origins
This phrase is commonly used in English-speaking countries and may not have a direct translation elsewhere. 
After seeing someone fall for a street scam, he muttered, 'There's one born every minute.'
Pro Tip 3/3Informal Use
It's an informal expression best used among friends or in casual conversations, not in formal settings. 
In the office, joking about a gullible intern, 'Well, there's one born every minute!'