Either a term for a gay couple, or a man and a very young boy whom you suspect are engaging in sexual intercourse. If you spot the latter please report it to the local authorities.
Dude, I'm calling the cops cuz I see Batman and Robin, and Batman's grabbing Robin's ass!
When you ejaculate on a girls face and stick a wash cloth over it giving the appearance of a mask. Once this step is complete, the younger and smaller homie jumps out the closet for round two.
Did you batman and robin that hoe last night??
"Hell yeah we rocked the b and r. I batman'd that hoe and lil jimmy busted out the bathroom and went robin on her!"