Adjective
1. motiveless
2. unprovoked, unmotivated, easy
Noun
1. light, loose, promiscuous, sluttish, unchaste, sensualist
Verb
1. piddle
2. wanton away, piddle away, trifle, spend, pass, live
3. wanton away
4. trifle away, spend, expend, drop, luxuriate
5. consume, squander, waste, ware, chat up
6. flirt, dally, butterfly, coquet, coquette, romance, philander, mash, act
6. behave, do