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1.
To engage in anal sex.
Woah! I can't BELIEVE that she let me Nudge the Fudge. I wasn't expecting that turn of events!
by Jonathan87 April 10, 2004
 
2.
to Engage in a "69", and the guy accidentally bumps his nose against the girls anus.
"Whoops.. sorta nudged the fudge.. hope she didn't notice that... oh boy... this is awkward..."
by Jonathan87 April 11, 2004