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2.
1)mispelling of phallus(the scientific name for the male reproductive organ)

2)can also be used as an insult
1)"look at how flacid his fallis is"

2)"omg, that kid is such a fallis. not only does he gel his hair but he steals people's essays too!"

"i think id kill myself if my last name was fallis"
by herbie versmelz March 19, 2006
 
1.
The most incredible girl in the world. She is kind hearted, optimistic and immensely passionate about true love that will last through the ages. She is one in a (current population of the planet). She is most beautiful princess. She is considered weird to the all but perfect to one.
She is a Falli to me, always have and always will.
by Fantastic Follower August 30, 2013
 
3.
adjective, when a women’s fat overhangs her pussy (3)
ahah, i bet that women has a fallis
by Pat Wallwork November 05, 2006