Sounds like a brat to me. I didn't wear a kilt to my graduation.
By the way, you'd get a kick out of my niece's wedding pics that show a wonderful blending of her father's fifth-generation American Western, ranch heritage on one side, and first-generation Scottish on the other -- brothers are wearing family tartan Kilts, and cowboy hats! We sent the pic to a cousin in Scotland, who got a huge kick out of it!
And all in attendance were glad.