Kalabasa means: Kalabasa, the tagalog term for squash is Kalabasa. Kalabasa can also be used to open your mouth when you are speechless. Kalabasa can be used to describe this condition. When you say “Kalabasa”, your jaw falls as you speak. This is especially useful after exams, quizzes or even an incomprehensible joke. (in Community Dictionary, added by Nathan Humphrey)