To blow up on the launch pad means to ejaculate on a woman’s pelvis or vagina before even entering.
*virgin*: Hey bro, I’m about to smash Vanessa tonight!

*bro*: Nice man, just try not to throw up from excitement or blow up on the launch pad lmaoooo!
by Mr.krabbs January 19, 2019
Get the Blow up on the launch pad mug.