The process of having intercourse while the female partner has a moderate fever. Preferably coming down from the flu when extra mucus output begins. Typically performed by couples, the male should not have a fever, thus giving him the extra sensations of a super-heated extra-slimy pussy.
Unless the fever is over 100°F it's not considered 'hot clam'. A fever of 103+ is extremely mood-inhibiting thus only achievable by master hot clammers. Therefore optimal temperatures will be between 100-102°F ~ 37-39°C.
When a man reaches 50 plus years of age and his ball sack has dropped to an appropriate level he has grown a Man clam. Man clamming is when another man stretches the man clam and wraps it around his peins and pumps to completion.
BroLarry just turned 50, do you think he is ready for man clamming?