spit-take
n.— «At dinnertime, they had to bring in the “spit-take’ rule. Nobody was allowed to talk to someone else at the table if that person had food in his mouth because it more than likely they would choke to death laughing.» —“Mandy Patinkin And The Princess Bride” by Rob Lowing Sun-Herald (Sydney, Australia) Dec. 6, 1987. (source: Double-Tongued Dictionary)