Knowing a Gylfi is so cool, as all Gylfi's have ginormous pennises, they like to have fun and sleep with sexy women everyday, in the lunch cafeteria bathroom.
Wow that guy is so hot, he is such a Gylfi.
Who is that guy over there with big pennis, bro that's Gylfi.
if you know a Sigurdór you are in grave danger, because most Sigurdór's would kill you with that enormous pennis, all women fall for guys named Sigurdór, they're a hit.
Wow who is that guyover there with the hot body, he's such a Sigurdór.