From Augmentation, page 21:
"...Characters with this quality suffer an unexpected genetic disorder that manifests as ugly and visceral physical deformities... The character and gamemaster should negotiate to decide on a deformity that is suitably negative."
It doesn't give any physical penalties, only social ones; so what are some genetic disorders (real or imagined) which might constitute a "gene freak" without affecting athletic or combat ability?
Links to pictures are encouraged.
PLEASE LABEL YOUR LINKS, ESPECIALLY IF THE PICTURES LINKED TO MIGHT DISTURB PEOPLE.