This recently coned slang word is likely a shortening of the interjection Tumpak! (“Spot on!”) or simply an onomatopoeia for an explosion.
Think of the English word “Boom!” (That’s right! That’s how it’s done!)
Pak na pak!
Exactly!
The word ganern is often paired with pak as in “Pak ganern!”
Examples of multi-purpose usage:
Nasa Diyos ang pak, nasa tao ang ganern.
Ang hindi pumak sa pinanggalingan, hindi makaka-ganern sa paroroonan.
