It involves playing jokes on a friend or acquaintance by sneaking into bed with them, especially when they think you're someone else.
When you see the look of utter shock when they realize you aren't their boo, you have a bedgasm!
Hey, home! I snuck into your Discordian American Princess's bed last night and she said let's do sharies! When she saw who I was she had such a shock on her face it gave me a bedgasm!
Oh yeah? You should see the look on your face when I punch your face in. How about a punchgasm, mother fucker?
The intense euphoria felt when released from a bodice or corset. Most often seen in Renaissance Festival attendees and workers, SCA event participants and fetish club goers.
"I had such an intense Bodgasm yesterday at the end of Fest! I saw stars and almost fell down."