A term used in the mobile phone industry to describe when you take something that is not broken and change it and in the process of changing it you break it because you are a giant dumb ass!
Well he really nstled that project, thats why everyone is out of a job.
Well the pacemaker was working fine till you decided to nstled it, now Dustin is dead, good job Andy.
Nasty Applesauce is the root definition of the word which began to encompass all things that are gross and/or nasty. Also can be shortened to only, "Nastle" meaning the same.