The act of attempting to entrap a man in a relationship by intentionally becoming pregnant.
"I'm gonna keep swinging my baby lasso until I catch me a man."
"Don't take her word that she on the pill bro, baby lasso'll fuck your shit up."
A child that is purposely conceived with the intention of roping in a man and prolonging an already doomed relationship. A woman who ropes a man into a relationship by intentionally getting pregnant.
Person A: OMG! Did you hear that Jen and Peter are having a baby.
Person B: yeah! It's totally a lasso baby.