Vagarious (adj) (rare)
Erratic and unpredictable in behaviour or direction.
Late 18thC, from the sense of changing, inconstant ‘vagary’.
“It was hard to keep up with his vagarious behaviour.”
“The vagarious regime was tiresome.”
Rampallion (noun) (rare) (archaic)
A ruffian, a villain, a rascal.
Late 16th century; earliest use found in Thomas Nashe (d. c1601), writer. Origin uncertain. Perhaps from ramp + -allion, perhaps showing alteration of rascallion by association with ramp. Perhaps compare later ramscallion, rapscallion, tatterdemalion.