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1.
(verb) to ejaculate, cum, to grunt suddenly and passionately; exclaim
The new pledge got a sperming.
by suite1157 February 25, 2007
 
2.
Moving through a crowd to get to the front, commonly done at concerts. Not to be confused with Salmoning, which is walking against a group of moving people.
Lindsay: How did you make it to the front of the crowd?

Paris: I am a master at sperming.
by Deepthoughts December 27, 2011