Popping wood when thinking about an impending occasion where you're guaranteed to get ass. It can range anywhere from a semi to a full on rager, often depending on how hot the girl is and how close you are to go time.
I got an anticipatory boner when thinking about how I'm going to smash that girl on Saturday night.
"Holy shit, man! I have a chilly boner over that car!"
"The red hot chili peppers give me a red hotchilly boner!"
"Oh my god the 80s give me a chilly boner."