Very embarrassed/worried about my husbands new dress sense?

My husband used to wear the typical male clothing, jeans, jumpers, polo shirts, you get the idea! Anyway, I had a work meal a few days ago, which we were allowed to bring our partners to. It wasnt possible for us to turn up together, as he was finishing off some jobs at home and I was going straight from work. So there i am, waiting to meet him outside the meal, and he turns up wearing a t-shirt which reads "ADIHASH" in the colours of the jamaican flag, not only was i DEEPLY embarrassed as i work as an accountant and everyone i work with is upper class, but as far as my knowledge is concerned, my husband does not, and never has smoked weed. I do not know if my husband mis-read the t shirt to say "ADDIDAS" but my husband never even wears this. The next day, he came down stairs wearing a hat which said "GANJA FARMER" on it, with a cannabis leaf printed all over it. I am very concerned, what should I do?