What is what does it mean when a guy says thank you?

The meaning of "thank you" from a guy, like from anyone, depends heavily on the context, tone, and relationship you have with him. Here's a breakdown of potential meanings:

Ultimately, interpreting "thank you" requires considering the https://www.wikiwhat.page/kavramlar/Context of the situation, his https://www.wikiwhat.page/kavramlar/Tone%20of%20Voice, and your https://www.wikiwhat.page/kavramlar/Relationship with him. Don't overthink it unless there are clear signs of sarcasm or underlying meaning.