Salmond stands for the person in the crowed that no one notices until they do something outlandish. They usually try to become the center of attention whether they like it or not. The word originated from Salmon which is close to the type of fish so calling someone a Salmond (SAL-mond) can mean that they like to swim or that they just rock out all the time. Personal prefderance applied.
Dude! That kid is like Salmond! He can swim ALL day!