pissing contest

Definition from Wiktionary, a free dictionary

[edit] English

[edit] Noun

pissing contest (plural pissing contests)

1. A boys' prankish competition to determine who can urinate the furthest up a wall.
2. (idiomatic, vulgar, slang) An immature dispute over some trivial matter.
3. An argument which is instigated, or exacerbated while consuming alcohol

   I'm not getting into a pissing contest with him over who has the fastest car.