A fork of Rural Dictionary
When you finger someone after eating spicy food with your hands.
“Damn, Adam gave me a Mexican Wet Willy last night after we ate mango habanero wings. I had to douche with ranch to cool down.”
The act of giving a regular wet willy but instead of saliva, you stick your finger up your nose and then in the victim's ear.
Wow! Frank just gave Cassie a Mexican wet willy... He's been sick all week.