Transporting or carrying a baby unsafely, typically in public. This can include holding the baby under the arm like a foodball, or traveling without a car seat.
"There is a shuttle from the hotel to the stadium; can we britneyspears the baby over so we don't have to park?"
"Kellen has been britneyspearsed all over this weekend and hasn't complained once. He's so awesome."
"I saw Monique britneyspearsing the baby four times! Do you think I should tell Erin?"