A word used to (sometimes sarcastically) describe the amazing mediocrity of something.
That pattern looks mehtastic on that fabric!
Harry's party was mehtastic at best.
To bluntly refuse to start to do an action.
(To refuse to begin another action)
Should I try the French blend? Nah, screw that initiative. I'll go with my regular blend.
"We should go to the mall first." "Screw that initiative."