An orgasm so powerful it leaves you with tears streaming down your face. Usually happens when two people are in a heightened state of emotional and/or physical connectedness.
A very good thing :-)
<After orgasm>
"Why're you crying?! Did I hurt you?"
"No, no, I... wow... that was amazing, you made me crygasm."
the emotional state of euphoria of something so perfect and mindblowing it both causes you to orgasm and uglysob at the same time because things will never get better than that very moment
made famous by the tumblr louiscrygasm.