The Collaborative International Dictionary of English v.0.48:
Quob \Quob\ (kw[o^]b), v. i. [Cf. Quaver.] [Written also quop and quab.] To throb; to quiver. [Local & Vulgar] [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Quop \Quop\ (kw[o^]p), v. i. See Quob. [1913 Webster]