When someone jumps the gun during an attempt to synchronize cracking open cans of soda or beer... therefore ruining the massive head-turning "clack" sound you were all hoping to create.
question: "Dude! what happened there? We were going to crack-open on the count of 3"

response: "Sorry man... I've been having trouble with premature eclackulation lately"
by Catrick Swayze May 29, 2011
Get the premature eclackulation mug.