sink-runner 

One who is afraid of doing what it takes to get the job done. In relation to giving a male oral sex and running to the sink instead of swallowing.

My friend is such a sink-runner, he wouldn't come downtown and pick me up when my car broke down.

sink-runner by dr.js September 14, 2008

sinkrunner 

One who, after performing fellatio, runs to the sink to spit.

Dude I thought the chick was cool when she starting slobbin my knob but it turned out she was a dirty rotten sinkrunner.

sinkrunner by poonatic July 30, 2008