Blocking someone on a social networking site, hookup site or app before that person has ever had a chance to contact you.
Gay Guy A: Eww, look at that nasty old man!
Gay Guy B: Gross, he's so old he's like 35! Did he contact you?
Gay Guy A: No, I pulled a Preemptive Block before he could ever dare try to get with my hotness!
Gay Guy B: Nashty.
Gay Guy B: Gross, he's so old he's like 35! Did he contact you?
Gay Guy A: No, I pulled a Preemptive Block before he could ever dare try to get with my hotness!
Gay Guy B: Nashty.
by Larrold May 14, 2011
The act of preventing interaction between one or more females with one or more men prior to any communication between the two groups, thereby negating the need to cock-block them later on, after they have started making moves on the women.
A: Hey man, how were those girls that Johnny showed up with?
B: I don't know, he sat down at a different table, so I couldn't talk to any of them.
A: Ah, dude, that was like a preemptive cock-block.
B: I don't know, he sat down at a different table, so I couldn't talk to any of them.
A: Ah, dude, that was like a preemptive cock-block.
by Swill128 June 21, 2009