I appreciate your longing for receiving knowledge full to the brim. If you give yourself trouble to see my previous post above you will see my words "one important meaning of this word is as follows". Of course I know another meaning of this word. Please see below.
The condition of having one's clothing stuck between the buttocks, often from having had one's pants or underwear pulled up as a prank.
A wedgie is the practice of pulling someone's underwear up causing the underwear to wedge between the buttocks. It can be inflicted as a practical joke, or as a form of bullying, depending on the context and people involved, and can often be painful to receive. A wedgie can also happen when a person's undergarments get bunched up and "ride up" between the buttocks, causing discomfort and annoyance. This can be caused by bad posture, awkward sitting or tight underpants. This is used as a torture device from bullies.
There is also a hacker term "wedge" = a bug.
In my opinion so heterogeneous information might be very shocking for a member with only 5 participations at the present forum.