Long Erect Nipples much like the Neck section on an american Saltwater clam.Often Clam Necks will found frequenting your more disreputable tavern and bars(see barfly)and for the price of a few strong drinks you can take them home and twist them between your fingers.
"hey I picked up this drunk barfly the other night at Joes Bar and Grille and I twisted her clamnecks all night long!"
a long nipple
Look at the clam necks on that stripper.
To smoke a Blunt without ashing it. the Ash will look like a clam neck.
Damn son, that stressed me out, lets go clam neck this blunt.