You can say that again
Definition 1 of 1
Pro Tip 1/3Strong Agreement
Use when you completely agree with someone and want to emphasize your agreement. 
A: 'This is the best pizza in town.' B: 'You can say that again!'
Pro Tip 2/3Casual Conversations
It's best used in casual or friendly settings, not in formal or serious discussions. 
A: 'That movie was incredible!' B: 'You can say that again!'
Pro Tip 3/3Not Literal
It's a figure of speech, so you're not asking someone to literally repeat themselves. 
A: 'I'm so tired of this weather.' B: 'You can say that again!'