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1.
Waving your arms around and talking total bollocks. Ideal for use when managers/advertising types/tv producers start spiralling out of control.
Stop testiculating and give me a straight answer, if you can.
by Martin Peake May 24, 2005
 
2.
To 'testiculate' is to thrust your groin whilst dancing.
Oh dear, there's no way in hell Joel's gonna get that girl. She seems mightily put off by his by his testiculating.
by McKECHN13 March 12, 2010