1 definition by rainbowtrouter

When a fly fisherman is eating out a girl, he reaches over to a bucket of warm water that he has prepared and pulls out a live rainbow trout. He proceeds to shove the trout up the girls vagina until she orgasms .
1. Mac gave the love of his life, aktrout girl, a squirming dersman after a long day of fishing on the river. She proceeded to immediately dump her loser boyfriend in search of a much more exhilarating experience with mac.

2. Upon becoming intimate with a friend of his for the first time, Austin gave her a squirming dersman. This immediately got them both in the mood for a long night of love making.

3. Ray was being apathetic about flyfishing, until he received a squirming dersman from a local fly fisherman.
by rainbowtrouter February 12, 2014
Get the squirming dersman mug.