A 2-4 or a Two Four in Canada is a large case of beer because a large case of beer is 24 bottles.

The first long weekend of the summer can also be called the 2-4 Weekend because the traditionally named Victoria Day weekend is a time for opening the summer cottage and getting the boat in the water. It is also the start of fishing season in a lot of lakes. Both activities require at least 1 2-4 for each male participant.
Let's grap a couple of two-fours and head out to the cottage to get in a little fishing on the Two-Four Weekend coming up.
by Dictionary Ei May 8, 2016
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When you are playing a card game such as killer or poker and you you get a two and a four. You have to take two Shots or drink two times.
Yo! Liz got two four! She gotta drink twice!
by VietPhunguyen July 19, 2009
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Especially in Ontario, the capacity of the cardboard case purchased from an Ontario Beer Store; there are TWENTY-FOUR bottles (not cans) in the case.
Doug: hey Bob, it's your turn to go to the Beer Store, to buy a Canadian two-four -- while you're up, get me a L.I.P. grant and some Canadian, of course bacon.
by Canadian consumer of beer February 9, 2010
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Queen Victoria's birth day, May 24th, is a statutory holiday in Canada and the first long weekend since Easter. It is the traditional weekend during which one opens 'the camp' (cottage), and signifies the start of summer (and Blackfly season) in Canada. The reference to 'two-four' rather than 'twenty-fourth' is a Canadian inside joke refering to the obligatory case(s) of 24 bottles of beer, or 'two-fours' required to celebrate the opening of the camp and to steel one's courage against the blackflies and the mice that will have settled into the camp since it was closed in the fall.
"Did ya go to the Beer Store and get a couple of two-fours for camp? It's May two-four, eh, and there'll be a lineup!"
by KAL May 26, 2004
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Two two four, 224, 2-24 is used in reference to having sexual intercourse with 2 different people in a 24 hour period but not together.
sleeping with one girl in the morning and a different girl at night. Last Wednesday was so great, I ended up having a two two four with the girl from English class and the bartender at the pub.
by Dirt_bag_dan_85 January 16, 2014
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A Canadian public holiday, also called Victoria day. It is known for a weekend where Canadian private school kids head to montreal to get shitfaced at clubs and hit on by creepy old men.

A definition of privilege and entitlement but most gladly own it.
Person 1: Hey, I'm so excited for may two-four. I've never been to Montreal.
Person 2: Hold up, you're like 14. This is for grade twelves only.
Person 1: It's okay, I'll just slip them a few twenties. Plus, I'm hot so it'll all be fine. *flips hair*
by coleel May 17, 2020
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Tight cliq/crew. Similar to WU Tang
You on Two Four? Hell naw them niggaz is tight I aint cool enough.
by Method Man June 25, 2003
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