Goldfished
refers to instantly forgetting something regardless of importance.
compares to how a goldfish changes direction in water suddenly for no apparent reason.

Blondes are the most susceptible to this.
1.) getting into your car and leaving a coffee and briefcase on the roof and driving away.

2.) leaving the bathroom after a shower in the morning and pouring a bowl of cereal naked.

someone sitting at the breakfast nook: "Why are you eating cereal naked?"

moving the bowl of cereal below waist and shrugging shoulders: "I must of goldfished."