Things my students say: Let's get dirrty

I have one class with a group of four; two students relatively a bit older, two younger. I asked them how their weekend was. One student, a man, maybe late 40s or early 50s responded.

Older student: It was short and dirty.
Younger student: *eyebrows raised. Uh, what do you mean dirty?
Older student: Well, my wife and I walked through muddy fields.
Younger student: Oh, so you mean dirty in the negative, not positive.
Older student: How can dirty be positive?
Younger student: *big smile on his face.



Obviously some students in the class have a broader knowledge of slang than others.