Ok first of all press and hold V button ... Then press enter while holding it and type something in chat , after that release V button and press enter again . Here u go , now u have will have V effect which lasts as long as you press the V button again .. Its easy is it? :P And the best of all you dont have to use testosterone's command ''/v'' :P ..
P.S. I know that alot of ppl knew this trick , but some maybe didnt so Enjoy!