Sphenisciphobia (3.5e Flaw)
From D&D Wiki
You have an absolute fear of penguins.
Effect: If a penguin approaches you, you are automatically panicked.
If you see anything that looks remotely penguin-like, you are shaken until you can no longer see the penguin plus an additional three rounds.
If cornered by a penguin (actual penguin) for more than three rounds, you act as if under the effects of the Insanity spell for 24 hours.
Benefit: Bonus Feat.
DM ideas If you are running a campaign based off of comedic happenings instead of serious role play suggesting severe character flaws such as Penguin Fear would be an interesting spin, it also is useful if you make a NPC character have this flaw, as it adds a sudden overall fear of penguins in that campaign.