The other day at work, one of my female coworker from another team and I were working on a common task on my computer (we were discussing about our respective understanding of the problem we had to solve).
At one point (I was searching silently something in my computer), she decided to tell me (she looked enthousiast/joking/happy): "Then, muscle man?" I answered: "I'm not muscled, Peter (my desktop is in front of his) is".
I feel that her sentence was at best awkward because among my team of 6 men, I'm the smallest, the youngest, and the less sporty (Peter does 1 hour of body building 4 times a week for example).
What to answer to a compliment when you don't understand the intention? Because, if I simply say "thanks", it will mean that I take it at face value.