Thanks fo the link to the picture,. I wasn’t sure what they meant by “plug”.
Emergency exit doors over the wings don’t have hinges connecting them to the plane so they are kind of a ‘plug’ but I have never heard them referred to like that.
It takes 2 hands to remove those doors and set them inside the cabin or toss it out. One of my flight attendant classmates had a heated discussion with a one armed man who wanted to sit in the emergency exit row, insisting he was completely able to open the door with ONE arm. Uh huh.