Nailing your subordinate employee immediately before arranging for her to be fired. "Sexecute" usually describes a situation involving a person, usually a woman, of such conniving evil that they desperately deserve to be executed, or should be executed for the public/group good before they cause further/ inevitable problems, HOWEVER: is also a person of such sexual appeal that it would be criminal to waste their hotness, hence they need "Sexecution" before removal/shunning/etc

Hey, let's you and me go sexecute this roof.

There are a few items on the list of 100 things to do before I graduate that I need to sexecute in my time at Cornell.

I had done up au great sexification wit duh missus course she is be my sister. and i got meself sexecuted for done said actions. prior, er, previous. in the buttocks.