look up any word, like the eiffel tower:
 
1.
The olfactory organ found on a human. It is a very potent aphrodesiac.
"Human horn prices are skyrocketing in the black market."
by Mr. Feesh May 16, 2005
 
2.
Human horn is actually a penis - of interest to impotent Futurama alien heads of state.
See previous example of human horn.
by bryanfred May 12, 2006