1
A sad little drop of jizz that comes out when a guy gets hard but then realizes he's not gonna blow his load. It's like the universe laughing at him.
My guy got hard during the movie but had to leave before the climax. He had a tear of disappointment on his shirt.
He got a hard-on during the presentation but had to sit through the whole thing. His underpants were soaked with a tear of disappointment.
He got excited during the game, but when his team lost, he had a tear of disappointment on his pants.