1. Hesitant Acknowledgement: The "uhh" indicates hesitation or uncertainty. The person may not be fully convinced by what they received or may feel uncomfortable accepting the offer. They're acknowledging the thanks but not necessarily feeling genuinely grateful.
2. Uncomfortable Gratitude: The person may feel obliged to say thanks but doesn't necessarily mean it. They may be uncomfortable with the situation or the person offering the thanks.
3. Sarcasm or Humor: Sometimes, "uhh thanks" is used sarcastically to express frustration or disbelief. The person might feel they're not receiving a genuine or adequate thank you.
4. Surprise and Gratitude: Sometimes, the "uhh" can indicate surprise or a momentary lapse in thought before expressing gratitude. This is less likely if the speaker is saying "uhh thanks" with a flat tone.
It's important to consider the context and tone of voice to understand the meaning of "uhh thanks." If you hear someone say it, pay attention to their body language and the overall conversation.