Why do i have flabby ? (I'm a man)?

i have flabby , (unless their cold, duh) i do not have "man " i'm in top shape (pro mt biker and triathelete), i have almost no fat on my body and i have fairly large peks with almost no fat but still, only my are flabby. i don't understand... can i get rid of them? i know that most people have un-flabby , even if they have a little chub. tips?