a gerdunderm-ffin is the act of climbing on top of a public toilet stall, doing the splits, and sh-tting into the toilet below. this is a feat, and when accomplished, the gerdunderm-ffiner should have a lot of pride.
andy: oh, g-d! why is there sh-t splattered all over the toilet seat?!

jacob: i’m sorry. i attempted a gerdunderm-ffin, but failed miserably.

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