While one's (such as, a street seller or a stranger) back is turned to you, you walk away quickly, so when one's back is turned back around to return to you, they'll see that you're not there anymore.
A product seller at the Flamingo Hotel and Casino had given me a free iPhone 7/8 Screen Protector, he then was trying to sell me an iPhone Screen Protector for my iPhone X phone. He had turned his back to me to walk over to retrieve the appropriate screen protector, which gave me the opportunity to ghost him.
Ghost can be used as a nickname for people who hide their emotions but are very kind and caring. Ghost is usually a very gender neutral nickname. People with the nickname ghost are very funny, nice and amazing.
/ɡoʊst/
1. noun: an apparition of a dead person or animal.
2. noun: the thick white cloud exhaled after a massive bong hit; momentarily feels like your life has been drained.
3. verb: to cut contact without prior warning.
1. I thought I saw the ghost of my late grandfather last night.
2. Trey took a toke so big I could see the ghost leave his body.
3. Devon ghosted me last week, so it's been really awkward seeing him at work.