When you chew gum before hooking up, and as you’re making out you try to push the gum in her mouth.

"Dad gummit" is a very simple thing to explain.
First, you use reverse dyslexia for the first two letters in each term.
"Gud dammit".
Then one simply fixes the first term by changing one vowel.
"God dammit".
And there you have it.

dagnamit, Humorous, less profane variation on damnit.

A word used when angry.

A way to express anger, usually used by hillbillies and rednecks.

means "Shoot" or "Shit"

To be bothered, aggitated, annoyed, or any other "I just shit my pants" attitude.