What is Undie Punch?
1.
to be reamed unknowingly, usualy from behind while still wearing ones underwear. resulting in undies being stuffed into the oriface in question
i gave that bitch from starbucks a rightious undie punch..
she was all like
"AWWWWWW i say stop that young man dont punch my underwear into my date"
"captain to the bridge, there has been a royal undie punching on the lower deck"
See