A comical phrase used to imply one has to defecate. Instead of outright claiming you have to use the bathroom, one can simply say "I have to take a Count Dooku" and your intentions should be implied.

Count Dooku is actually a character from Star Wars, yet the phrase works based on Dooku's name being similar to dookie which is also a euphemism for defecating.

The phrase was made popular in the cartoon TV series "The Venture Bros"
Henchman #21: Dude, get out I gotta take a Count Dooku
by Piemanthe3rd August 28, 2009
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