Rogu'ish adjective 1. Vagrant. [ Obsolete] Spenser. « His roguish madness Allows itself to anything.» Shak. 2. Resembling, or characteristic of, a rogue; knavish. 3. Pleasantly mischievous; waggish; arch. « The most bewitching leer w... Found on http://www.encyclo.co.uk/webster/R/89