taking a quick and tiny pellet-like shit
in sexual intercourse, failing to pull out in the nick of time - therefore leaving a bean-sized amount of jiz in the vajayjay
"Dude you weren't in the bathroom long at all"
"Yeah, I only had to drop a bean."
"Omg, I'm so scared I might be pregnant!"
"Wait, I thought he pulled out?"
"Ugh, he did. But he totally dropped a bean."