look up any word, like bae:
 
1.
Someone is on my head again.
Ohh look at these frog components,*drops frog juice* oh no whats this on my head??? Ohh SIOMHA! Now i know what it is. Thank you (:
by Pissingshit July 26, 2010
 
2.
the true definition of slutty, to call one a siomha is to denote them as the scum of the earth.
guy 1. hey man see her? she looks hot!
guy 2. ah no man she's a total siomha!
by boobjockey February 26, 2012