A guy that thinks he has mad game, ruthlessly hits on women....and yet still never gets laid.
Hence his dick remains dry.
Usually everyone has at least one friend who is a dry dick, if unsure of this just look for these qualitys amongst dudes you chill with:
1) Wears unnecessary gold chains around neck, sometimes fake or tarnished.
2) Bathes in the most foul cologne that has ever graced your nostrils.
3) Eye fucks you from across the bar, then within 5 mins appears at your side casually rubbing against you and wispers in your ear in a creepy marvin gaye voice "mmm gurl, you smell sweet" (insert stupid ass pick up line here)
Oh god, here comes Chad, that dry dick wont ever stop trying to fuck me. You think if I give him $5 to get a blow job from a prostitute, he will leave me alone....?