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2.
When someone's entire body arches backwards and tenses up because something in being inserted in their ass, they remain locked in this position because if they relax just for a second, the object may go in their ass.
I'm going to jam this stick up his ass and get him in an asslock.
I tried to put my cock in my girl's add last night, I only got the head in when she went all asslock on me.
by Big Vic October 28, 2013
 
1.
The act in which one person is suspended in the air with their limbs inserted into 4 other people's ass's forming the asslock.
Hey man man do you want go asslock Peter tonight?

Sure, lets round up the family and lube up.
by Agnes Mcormick December 29, 2008