Twitty

twit fool, lame person, loser | Heʼs such a twit; he always crank-calls me! [C450 1920s British: ‘trivial idiot’] → twitty having the characteristics of a twit

To spend a day with the Hendersons — if you’re like me — would usually end up in your becoming gradually and gently twitty. Twitty is the English vernacular for nervous or clownish.