When someone posts images that aren't them on a
dating site or app (see cat-fishing), but you
still fly across the country to meet them, you end up
sleeping with them, and get crabs.
"So I met this
hot girl on Tinder, she sent me shots of herself in a bikini, we made plans for me to fly to Chicago to meet her,
and then I got crabs. Textbook crabshacking."
"I couldn't
help myself. He was so cute and sent me hipsterporn. I had to crabshack that fool."