Testipopping is when a adolescent
boy's voice jumps or cracks while
talking. This is usually seen as an embarrassing
thing, as everyone will probably start laughing at you.
Teacher ~ "Class, can anyone tell me what the Chemical formula for
water is?"
Boy ~ "<pop>YYeeesss</pop> Miss"
The "yes" part in this sentence is when the
boy testipops in his enthusiasm to answer this nerdy question
Everyone laughs as the boy flushes in embarrassment.