Werps!

Boookie proudly came upstairs announcing that he had pulled a tooth all by himself.  Aforementioned item was placed on the table to be exchanged for monetary reward.  Shortly thereafter, Seimi saw said item on the table and popped it in his mouth, thinking it was a snack.  After crunching it for a moment, he spit it out, with a "Werps!" (Whoops!)