When your large-breasted friend gets all pissy, moody, and and bitchy when she's mad about something. She may exert an annoying, high-pitched noise that sounds something like "eh!". Because of this, you may have real or imagined fears that she'll whack you unconscious with her gynormous tit. Can also be shortened to simply "TW".
"Did you talk to Sarah today?" "No, because she was majorlytit-whacky."
A term used to describe a guy's ejaculation on his partner's breasts. A young girl usually has a guycum on her boosom when she first experiments with sex.
Angie gave her older sister's boyfriend her first hand job when he stopped by early the other day. He pleaded for her to let him cum in her mouth, but this was the first time she had done anything with any guy, so she reluctantly agreed to pull her top off and let him give her a tit wash. She was embarrassed, but knew she wasn't the only girl in the seventh grade to let a guy blow his wad on her tits.