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2.
A giant explosion of semen that occurs after you havent ejaculated for a long time: a mega cumshot

Used to describe an unusally large load before or after ejaculation
"After I shelob in my bed, I usually clean up with a dirty beater or sock."

"After I jerked off in the Adirondack's, my sleeping bag looked like Shelob's lair."
by Christopher Finlay June 07, 2007
 
1.
A huge spider creature from the Lord of the Rings trilogy.

Most people will know her from Return of the King however those who read the books know that she was originally in the climax of The Two Towers.

She guards the secert path into Mordor that Frodo and Sam take with the help of the treacherous Gollum.
Shelob was great in both The Two Towers and Return of the King.
by Bloody Cape January 02, 2005