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1.
"Get it up." By extension, perform any challenging act.
Those evangelists would be more convincing if they could cut the mustard.
by cornholio October 06, 2003
 
2.
Men who are unable to "cut the mustard" can more than compensate by simply LICKING THE LID.
She: What's the matter, Mr. Softee? Can't cut the mustard?

He: Don't worry, I'll just lick the lid instead.

She: Oooh, you lover boy, you!
by Hugh Chardon Junior July 04, 2010