Chumberdink
A Chumberdink (chum-bêêr-dink) is the genitals of a male which is simply a little bit plumper yet not quite fully erect when engaged in copulation with others.
'Oi Barry, I was with this Hispanic gentleman in a Hawaiian shirt last Thursday and oooof. Once he started oiling up his chest hair I popped a full on chumberdink then and there.'