noun: a Wet Betty is the step sister of the wet willy. a Wet Betty is performed by sucking your finger tip, and swirling it around in someone's exposed cleavage and yelling "WET BETTY." This can only be used on EXPOSED cleavage; no reaching down t-shirts, turtle necks, or sweater vests!
Look at her huge knockers! I bet she'd love a Wet Betty.
by APro84 August 08, 2011