'Teeter' definitions:

Definition of 'teeter'

From: WordNet
noun
A plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end [syn: seesaw, teeter, teeter-totter, teetertotter, teeterboard, tilting board, dandle board]
verb
Move unsteadily, with a rocking motion [syn: teeter, seesaw, totter]

Definition of 'Teeter'

From: GCIDE
  • Teeter \Tee"ter\, v. i. & t. [imp. & p. p. Teetered; p. pr. & vb. n. Teetering.] [Prov. E. titter to tremble, to seesaw; cf. Icel. titra to tremble, OHG. zittar[=o]n, G. zittern.] To move up and down on the ends of a balanced plank, or the like, as children do for sport; to seesaw; to titter; to titter-totter. [U. S.] [1913 Webster]
  • [The bobolink] alit upon the flower, and teetered up and down. --H. W. Beecher. [1913 Webster]