I'd heard of "brown bag lunch" being a thing, and I'd assumed that was right wing trolling. What on Earth? If I bring lunch in a brown bag, am I allowed to ref

I'd heard of "brown bag lunch" being a thing, and I'd assumed that was right wing trolling. What on Earth? If I bring lunch in a brown bag, am I allowed to refer to it? Am I not allowed to bring lunch in a brown bag? Can I bring other things in a brown bag? If I racially discriminate my mid day meeting using a white bag, is that ok?