Top Definition
High School Block Out: When one with purpose hits the mental control/alt/delete to block out not so great memories or simply to remove clutter from the brain to store more useful information.

Another sentence scenario a former certain someone (name not to be mentioned) tries to friend you on FB and you receive this message "so and so wants to be your friend on FB" Reply "I'm sorry who are you again, I HSBO'd a shit load of ppl from HS and I can't seem to recall you, so you must have been deleted from my hard drive as being either A) unimportant or B) clutter; now which category do you fall under because now I'm going to have to dig up my yearbook".
In a sentence "Hey, do your remember me I was in Speech with you"? Me, "Umm, no I not only HSBO (High School Block Out) you, but I HSBO'd Speech Class altogether, now piss off".

Another scenario a former classmate tries to friend you on FB and you receive this message "so and so wants to be your friend on FB" Reply "I'm sorry who are you again, I HSBO'd a lot of ppl from HS and I can't seem to recall you, so you must have been deleted from my hard drive as being either A) unimportant or B) clutter; now which category do you fall under because now I'm going to have to dig up my yearbook".
by Reverse Aging August 27, 2012

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