You have the woo-girl. Unfortunately there is also woo-boys. Simply boys who goes "wooo" when they're excited. This is often found in typical groups of Party Swedes. Read: Stureplan
A Woo-boy is a middle aged white mail pedophile that drives a rusty, dented unmarked white van slowly near elementary schools and attempts to woo boys inside with stories of lost puppies or injured parents or gifts of candy. A Woo-boy is a child molester that takes a thrill in the hunt.
Mom: "here is your lunch Billy. Stay away from strangers or the woo-boy will snatch you"
Littly Billy: "Ok mom, I will"
A white male in his late twenties to mid thirties at a sporting event, drinking some Millers, and randomly calling “woo” as a mating call to his fellow woo boys.
Woo boys Brad and Chad wooed at each other during the entire 4th inning at the Pirates vs. whatever game.
A firefighter who has several hundred dollars in emergency warning equipment on his/her personal vehicle. Usually accompaned by several radio antennas. The typical woo woo may be wearing a fire department shirt in a public place and also sport a walkie talkie, fire department pager (or two) a cell phone (or two) on their belt.