a). The act of cumming and tea bagging at the same time
b). When you completely beast up and ace a test, reach an atheletic achievment or just finished getting a wank from some bitch.
c). instead of getting hit in the nuts straight on, get hit at the back of the sack.
a). Don- dude i testiblasted that chick
bill- dude thats some sick shit!
b). Don- 98%, fuck yeah son just testiblasted that algebra quiz!
bill- alright but your still never getting laid
c). Don- Dude are you ok?
bill- shit man, that lax ball just testiblasted me
Don- ...I'd be blown