A myriam  

when you commit to something and then bail

damn I knew that beaner was pull a Myriam

A myriam by lsmbcw February 27, 2009

pulling a miriam 

when you make plans in advance and then cancel last minute.

Roni: hey you ready for the hookah bar?

Mike: Nah i can't come man i gotta do something

Roni: Why you pulling a Miriam?

pulling a miriam by nycboy April 21, 2011