The Collaborative International Dictionary of English v.0.48:

Titubate \Tit"u*bate\, v. i. [L. titubatus, p. p. of titubare to
   stagger, totter.]
   1. To stumble. [Obs.]
      [1913 Webster]

   2. To rock or roll, as a curved body on a plane.
      [1913 Webster]