its when you cum 3 times on a girl's back, then you dip your NUTS in the cum. After that you put your whole nut sack into the girl's vagina. Last but not least the girl sucks your nuts clean so she can taste the cum and her own juices.
You: Hey Jennifer, I'm bored can I give you a dirty squirel.
A literal statement about twosquirrels playfully climbing a walnut tree on a sunny Spring morning
Stuart was feeling "chirpy" as he watched two squirrels in a walnut tree from his bed. Because Susie's mind was typically in the gutter, she assumed this to be a euphemism for the contents of Stuart's underwear. If only she had double carpeted her bottom step!