The Walk of Shame a the term used when a Young Person goes home with a person, for intimate reasons, and has to walk home early the next morning in the previous evening's clothes.
This term is generally reserved for Young People (college students and 20-somethings) and in my experience, reserved almost exclusively for young women (where it is then cast as a judgment of a woman's promiscuity). Most Web sites use male-based pronouns, so this may have been exclusive to my school. (And yet! Here are kits marketed to women.)
Here is Wikipedia on the Unmighty Walk:
The walk of shame refers to a phenomenon in which a person must walk past strangers or peers alone for an embarrassing reason before reaching a place of privacy. Most commonly, it occurs the morning after a night out at a bar, dance club, or party. People undertaking the walk of shame are understood to have spent the night at the house, apartment, or dorm of a sexual partner (or perceived sexual partner), particularly a one night stand. The topic is often of the subject of college newspaper commentary.
In general, it's not something you want to see on your kid's Facebook.
Walk of Shame, Wikipedia
Walk of Shame, Urban Dictionary
June 15, 2010's Dinosaur Comics