The phrase "giant sperm" refers to an exaggerated or very large version of the male reproductive cell that fertilizes eggs. It is often used metaphorically or humorously to describe something that is excessively or abnormally big. Full definition
New Zealand's only marine based whale watching company, offering visitors an up - close encounter with Giant Sperm Whales in their natural environment. (nzescape.com)
Such a long history of giant sperm points to intense sexual competition between males, says Matzke - Karasz. (newscientist.com)
Preserved giant sperm from tiny shrimps that lived at least 17 million years ago have been discovered at the Riversleigh World Heritage Fossil Site by a team including UNSW Australia researchers. (sciencedaily.com)