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2.
A cunt to the power of ten. When the word cunt alone absolutely won't cut it, cuntstack is a level up.
You're a fucking cuntstack.
by fizzypixels December 23, 2007
 
1.
Two bisexual chicks, one laying on the bed, and the other laying on top of her, face to face, making out. This provides a convenient and pecker pleasing cunt stack for the man to alternately tap on at his penis tingling leisure.
Once I started to cum, I hugged the Olsen twins very tightly around the waist and popped back and forth from one twat to the other for about 6 cum blasts apiece. It was the best cunt stack I ever fucked!
by Mike Bozdog June 19, 2006
 
3.
A orderly arrangement of cunts
usu. along a vertical line
George Bush is a cunt stack
by simon March 11, 2004