A condition occurring mostly in (although not limited to) uncircumcised men as a result of not cleaning their genitals, particularly under their foreskin. Their lack of concern for personal hygiene results in their genitals producing a nasty fish smell. 90% of men with this condition will request oral sex while remaining oblivious to the fact that they have it.
That guy I hooked up with had a MAJOR case of fish dick.
What the human male experiences after a night of unprotected sex with a woman then leaves in the morning without showering, and follows that with a day of hard work in a hot kitchen. It is a combination of a foetid stench, grease, slime and crusty scaliness in the genital region.
"Geez, Chef, I just took a leak, and I've got a rotten case of Fish Dick."