A poor imitation of pornographic like music commonly spouted by the Red Vs Blue Character Tucker when he hears a double entendre related to sexual innuendo.
Tex: Then I can hook a hardline up to Shelia
Tucker: Bow Chicka wow wow!
When you nut inside your friendsbussy, pull out, put a firecracker inside, light it, say "bow chicka wow wow" and wait for the back blast to splatter on your face