murr
A reply to a question to witch you do not have time to fully answer or to which the answer is already known by the questioner.

A conjunction used, where another word of the English language will simply not fit.
The forepart of a simple explanation made to a peer or used in an informal conversation.  

Person A:  "I wouldnt go in the pool"  
Person B:  "Why not?"  
Person A:  "Murr there is bacon in it"