My understanding of the definition "guys night out" is lying to your/wife girlfriend about a trip to Las Vegas, going clubbing in your 30's with male friends, spending time at a topless swiming pool and spending lots of money on gambeling, alcohol and strip clubs. Oh~ and part of going this route of guys' night out is making sure that other friends and family members are "in on it" so esentially having them lie for the boyfriend/husband as well. Last thing, sharing a king-size bed with your BFF is also part of the guys' night out have a good time thing.

When a group of guys go out together sans female friends, and generally go wild.

(N.) When a group of guys go out for the night. The other "Nine to Five" that takes place between 9:00pm and 5:00pm, usually on Saturdays.

A typical guys (or lads) night out involves going to a pub or nightclub and drinking excessive amounts of alcohol (mainly beer/lager), shouting obsenities at members of the public, harassing members of the opposite sex and generally being obnoxious.

a night out where a bunch of guys set out to do something that their conciences won't let them do. the attached guys usually end up bailing out their single friend out of jail because he's the only one who actually had guilt-free fun!

when a member of the male sex goes out to party with his freinds, who are also men, leaving his girlfreind or wife at home. this enables him to get really pissed, and look at other girls without getting the Death Stare

Most often an evening in which a group of men tell their females that they are going out to do one thing or another together as men. Most often an excuse to meet up at a bar and from there see who can get in the most trouble without actually getting into any shit.