What does it mean happy as a clam?

Chef's answer
The phrase 'as happy as a clam' is a simile that expresses happiness. In other words, people use it as a way of saying they feel delighted. Example: Cody felt anxious about going to the dentist. He hasn't gone in for a checkup in years, so he was worried that he would have a mouth full of cavities..
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Most clams live and reproduce in shallow ocean waters. At low tide (when the ocean recedes furthest from the shore), clams are exposed and prone to humans and other predators snatching them up. Conversely, at high tide, they are "safe," and therefore happy.
Most clams live and reproduce in shallow ocean waters. At low tide (when the ocean recedes furthest from the shore), clams are exposed and prone to humans and other predators snatching them up. Conversely, at high tide, they are "safe," and therefore happy. ...
The phrase 'as happy as a clam' is a simile that expresses happiness. In other words, people use it as a way of saying they feel delighted. Example: Cody felt anxious about going to the dentist. He hasn't gone in for a checkup in years, so he was worried that he would have a mouth full of cavities..
US, informal. : very happy She spent the afternoon reading and was (as) happy as a clam..
Comfort food makes us feel happy psychologically as opposed to physiologically. ... Because they're linked to memories, comfort foods vary for each person, but there are some links among genders. One study found that women tend to like sugary, sweet foods like ice cream while men like savory foods like soup and steak..
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