when someone or something stands in the way while you continue to steal something
Person #1: Dude. Block out for me while I jack these DVD's.
Person #2: I got you brah.
by Mizzzaaaxxxx May 10, 2010
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Excluding oneself of all social gatherings and media.
Blocking out myself out for the night
by HUODPF June 29, 2018
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When an athlete with the purpose of guarding or defending another player or area, usually an offensive lineman in football or a basketball player on defense, lets the opposing player attack the quarterback/basket without any show of push-back by the player who's supposed to protect the person or thing in need of protection; also referred to as the "lookout defense."
*defensive lineman runs right by the offensive lineman*
Offensive lineman: LOOK OUT!
*quarterback is absolutely pummeled for the sack*
ANNOUNCER: "Offensive tackle, Edwards, with the look out block on that play..."
by Brandolakes February 07, 2018
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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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