1 definition by mung35

Top Definition
The thought of a person or a thing that mentally crawls inside you and interferes in your day-to-day activities. It consumes your every thought and hinders your way of life. Much like the fish it was named after (the Candiru) which crawls inside you and lives inside, so do these thoughts.
George: What’s your problem?
Izzie: My problem…is you. You’re my penis fish.
George: Your what?
Izzie: You’ve crawled in and latched on, and now I can’t move, or talk, or think, or even pee without the necking feeling that something is eating through my organs!
by mung35 May 15, 2007

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