I'll give that some thought.

Meaning

I'll consider your suggestion carefully.

Examples

• John: We should consider implementing a new marketing strategy.
• Alice: That's an interesting idea. <b>I'll give that some thought</b>.
• John: Take your time, but let me know what you think.
• Alice: I will. After reviewing the data, <b>I'll give that some thought</b> and get back to you.