shast mast 

Where you sit on someone's chin and shart.

I'm going to shast mast you in your sleep.

shast mast by Hazzardouspat May 14, 2015

shaft master 

one who mastered the shaft

andy you fucken shaft master shut up

shaft master by elilizlle October 30, 2007

shat mastering 

Literally, the act of mastering shat; asserting your natural authority over God's putty; indulging in a dance under chocolate rain. Also, dominating a predictably submissive William Shatner.

"Wow, I had no idea you were into shat mastering... Are you busy tonight?"

"Look at that shat master! He's totally giving it to the Shat!!"

shat mastering by Narwhal Rider March 2, 2009

Shaft master 

Cock expert

Jeff is a shaft master.

Shaft master by #table2 June 15, 2021

shastastic 

Having the qualities of the soda brand Shasta, esp. being easy to obtain (or cheap), but not of the greatest quality. mediocre

I was full after eating a shastastic lunch of four McDoubles at McDonalds

He doesn't have a complicated job or long hours, but he doesn't make too much money, either. He lives a shastastic life.

That girl Fred hooked up with at the party is ready for a good time, but isn't the type for a long-term relationship; she's pretty shastastic.

shastastic by Sam Schu January 1, 2009

Shaftmaster 

n./adj. A more euphonic synonym for Cockmaster.

"Shut your filthy hole, you ass-blasting shaftmaster!"

Shaftmaster by I'mNotATerroristButIPlayOneOnTV! August 4, 2003

shartmaster.69420

Genderfluid lesbian obsessed with naegami that lives on my for you page and spills facts

shartmaster.69420: cool people make me an urban dictionary page

shartmaster.69420 by LESBIANSLOVEKUGIEKIZUCHI September 6, 2021