look up any word, like blumpkin:
 
1.
To muck around or be stupid.
Michael, stop fart-arseing around and mow the lawn.
by xXDaniiXx March 07, 2007
 
2.
some one who is fannying around!! taking along time to do something!
Mum: Can you come down and clear up your mess and stop being a fartarse
by Nikki n Steffi January 18, 2008