A limp dick is a flaccid penis, or a case of erectile dysfunction.
It can also refer to a weak person of either gender, but usually male.
“Limp dick” can be caused by various factors, such as an underlying condition, high alcohol or drug intake – also called “whisky dick”, stress, or simply not being aroused.
Sometimes, no matter how hard you try, it just won’t stand up, and although this can happen to anyone, many view it as a lack of masculinity, often implying that someone is weak or “less of a man”.
Hence, “limp dick” can both mean an unerect penis, but also a weak, fragile person.
Origin of the term
“Limp”, besides meaning someone walking unsteadily, also means “flaccid” or “lacking stiffness”, and has been used as such since the early 1700’s.
The second part, “dick” has been an euphemism for penis since the late 19th century.
It is unclear who used the term as a whole first, but it is a natural synonym for “flaccid penis”.
Spread of the term
The term has repeatedly been used in pop-culture, first in the 1989 hit “Hello Brooklyn” by Beastie Boys, and later in 1996 song “Dopeman” by N.W.A.
In 2014, YouTube user Deadtacoforce5 uploaded the vulgar, humorous rap “Limp Dick Song”, gaining over 100K views and 641 upvotes.