Fumble

When a fumble spell is cast, the magic-user causes the recipient of the magic to suddenly become clumsy and awkward. 

Running creatures will trip and fall, those reaching for an item will fumble and drop it, those employing weapons will likewise awkwardly drop them. Recovery from a fall or of a fumbled object will typically require the whole of the next melee round. Note that breakable items might suffer damage when dropped. 

If the victim makes his or her saving throw, the fumble will simply make him or her effectively operate at one-half normal efficiency (cf. slow spell). 

The material component of this spell is a dab of solidified milk fat.