Invented by Dane Cook, said it in his may 2008 show in vegas
Mary: Well how about I stop by around 10:30 then and we can all go to see that She's Just not that into you movie?
Jane: I swear to god Mary you need to quit twat swatting me because I just want to get some dick from Kyle. I mean Jesus Mary, you twat swat me like everytime I see Kyle, I just want to spend some time alone with him. You need to quit being a no-good twat swatter!
Mary: Oh my God Jane, I had no idea I was twat swattin' you like that. I apologize and it will not happen again.
Jane: Oh Mary thank you so much. I am sorry for being such a Ho-ma. I just haven't gotten to ride the bologna pony for like 3 weeks now.
A girl that prevents another girl from getting some dick.
Ashley: Damn! what a twatswatter!
A slang term for a female cockblocker. A person who will try and keep you from getting what she will never have herself. Generally a freakishly unattractive, large, hairy woman, who likes to hang out with younger hotter chicks in order to try and hit on the guys that like them. However, once she notices that the guy is not into her, but into her younger hotter associate, she will do everything in her power to sabotage the relationship. Typically she will also try to get with the guy to no avail.
Girl 2: Wow, was there anyone else involved?
Girl 1: No just Cristina from work who always hangs around. She's fugly though.
Girl 2: Dude, sounds like she pulled a twat swatter on you. I'd kick her fugly ass.