An art similar to cock blocking. Where as cock blocking is in front view of the victim, Schangling is somewhat more devious. To sneak over to a girl in a bar or club when the person who was chatting her up,is on a short term absence " smoking , toilet or at the bar". Schangling is an act of espionage carried out from a distance, carried out only at the right time.
How did you get on with that girl Paul? "No good, she was talking to him when I got back from the toilet, he must of been Schnagling me"
The act of making a strong and lasting impression at a post lunch business meeting by projecting schmog all over the meeting room walls.
The only way Steve could see getting out of this 3:00PM process meeting and potentially this dead end job, was to conclude his opening remarks at the meeting with a good schmogging.