Tight or tired - a stupid question

At the beginning of last year I (22F) was in London for my very first trip abroad, keep in mind that english is not my first language and I’ve learned it mostly through North American media, so I struggle with different accents. At night one day I was craving sugar so I went to the little corner grocery store, while I was standing at the frozen dessert section, this old grandpa looking guy approached me, and this was the dialogue:

OG - Hi Me - Hi :) OG - You look “𝓽𝓲𝓰𝓱𝓽” Me - Ahn?? OG - You look “𝓽𝓲𝓰𝓱𝓽” Me - ????? OG - “𝓽𝓲𝓰𝓱𝓽”

I was so confused at what word he was saying, it sounded kinda like “tight” to me, but I couldn’t understand it in that context, so I assumed it was just a compliment in a word/slang I didn’t know and said “thanks!!”, smiled at him and went back to my desserts. He kept staring at me for a few seconds like he maybe wanted to say something else, or was waiting for me to say something, then he went away.

When I was almost forgetting this guy’s existence he reappeared and said “I hope I didn’t offend you” I just responded “no, it’s fine”, he stared at me again for a little while before going away. But that’s when I became really puzzled at what he had said, maybe he said I looked tired instead? If that was the case, there was a mom alone with 5 tiny crazy children near us, and he comes to say that I look tired? And I thanked him for it?

Anyways, this little stupid interaction has lived rent free in my head for over 1 and a half years. Did he say tired, tight or something else entirely? If he had complimented me, why would he think I would be offended? Unless he said something crass, but he seemed like a sweet old man, someone’s grandpa, didn’t look like that would be the case.