The phrase "uncircumcised males" refers to men who have not undergone a medical procedure called circumcision, which involves removing a fold of skin called the foreskin from the tip of the penis. Full definition
Male anatomy is very protective against these infections, although uncircumcised males do have a slightly greater risk. (modernmom.com)
As a 76 year old uncircumcised male I found your treatment of the subject to be very educational. (wellnessmama.com)
A typical illustration is to be found in Yahweh's supposed insistence on circumcision — «The uncircumcised male... shall be cut off from his people; he hath broken my covenant.» (religion-online.org)