sitting duck
easy mark

A woman alone might look like an easy mark for any guy on the loose.

If the children have had a good time, parents are an easy mark for purchase.

The truth is, though, that I am an easy mark.

She was, like many women, an easy mark for animals, particularly the young.

This little valley must've seemed like an easy mark, but within a few years, they'd learned to respect us.

She wasn't going to be an easy mark, someone who gave away too much information just by making assumptions.

He has been an easy mark for most of his adult life.

Like so many others, the Nelson house was an easy mark.

What kind of an easy mark do you think I am?

"They looked at him and made up their minds he was an easy mark," the Chief said.