Happenis (pronounced Happiness) is the erection of a penis. Men are typically not held accountable for their actions as this condition usually leads them into relationships that otherwise they would avoid.
“What is happenis? I have a hard on… then yes - this must be love”.
by Sex and the Sunday Morning Woody July 08, 2006
A clothing company based in Orlando, Florida, that uses an erect Penis as its logo.
Wow, sweet shirt! Did that come from Happenis?
by CelticsFan69 August 14, 2008