Ball eater: Something that is really hard to do and usually results in failure or multiple falures
That test was a ball eater. That hydrolysis reaction ate my balls. Repairing that engine ate my balls.
noun; One who engages in the act of fully inserting testicles into his/her mouth and suckling them.
guy1:I saw Joey sucking some guy's nards the other day. He sure had a mouthful!
guy2:Wow, Joey is such a ball eater!