Could you tell me what is "menso"?
"por lo menso"
2 Answers
It can be a bad spelling, as Eddy said, or can be an mild insult: "menso". We need more context.
I think this is "por lo menos" which means at least. "Al menos" is another way of writing the same thing.
"menso", by the way, is an adjective which means stupid in Chile or Mexico.