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1.
A frenis gets erect at the sight of baguettes and/or croissants.
Eg "omg you should have seen my Frenis when I went to the Boulangerie the other day"
by drhammer July 11, 2010
 
2.
A frozen penis.
Pronounced as freeniss. Similar to that of a fripple (frozen nipple)
-omg its so cold i have a frenis :|
by pheebop June 05, 2009
 
3.
to give a blow job.
Hey Baby do you want to Frenis me tonight?
by mihghhfjsjaksjbsadbfh January 22, 2009