The stiff, cold, sore feeling you get in your dick the day after fucking a few too many chicks, or just having a bit too much fun with yourself.... Typically associated with losers who get no ass, or womanizers.
Girl: hey sexy wanna get it on?
Dude: i'm sorry, i would, but i had a bit too much fun with myself last night and i got a real bad case of dickamortis this morning
Girl: ha wow, loser.
A very sexy man that enjoys to watch Watchmen and smoke a nice cigar. He also likes to say "Yo diggity" when he joins people's Ventrilo channels, and then mutes his Ventrilo shortly after so he can catch up on the most recent episode of "Californiacation"
That guy? He's totally a Nickamortis. Can't you tell from that signature cigar that is in his mouth?
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.