Ditzy (3.5e Flaw)
From D&D Wiki
You demonstrate a measure of airheadedness that can make even saints lose patience.
Effect: You take a -4 penalty to all Concentration, Disguise, Gather Information, Knowledge, Listen, Spot and Search checks.
Roleplaying Ideas: Your character is scatterbrained, all the time. This doesn't mean you're dumb, but rather means you have trouble resisting drifting off into daydreams, recalling complex or detailed information (especially things that you consider unimportant), or focusing on any task for longer than necessary.