The comparative term to the male "cock block." It means to effectively stop a female companion from getting laid.
I was gonna bring this hot guy back to my apartment, but my bitch roommate decided to pull a clam jack.
লিখেছেন- Lon 11 de অক্টোবার de 2005
1 more definition
When a woman interferes with one's attempt to hook up with someone. Similar to "cockblock".
"He was totally into me, but then that bitch showed up and clamjacked me."
লিখেছেন- Whereswill 23 de জানুয়ারি de 2007