讲讲 is the reduplicated form of the verb 讲 (jiǎng). Reduplication of action verbs in Chinese adds a light, casual, or tentative tone, often meaning 'do a bit of (verb)' or '(verb) briefly'. You'll hear it in suggestions or requests, like 给我讲讲 (tell me a bit) or 咱们讲讲 (let's talk a bit). The base verb 讲 covers 'speak, tell, explain, discuss', and the reduplicated form carries all those meanings with a softer, more conversational feel.