I'm in desperate need of help.

Meaning

I urgently require assistance.

Examples

• John: Is everything alright?
• Alice: No, I'm in a terrible situation. <b>I'm in desperate need of help.</b>
• John: What's wrong? Tell me everything.
• Alice: I've lost my keys and I'm locked out of my apartment. I really am <b>I'm in desperate need of help.</b>