1 definition by Sir Awesome-o

Top Definition
the time that you drink milk-shakes.
it is the time right after 4:20 so you can drink Milk-shakes also, 4/30 is national Milk-shake day.
-"hey rob what time is it"
-"oh, it's 4:30"
-"man! its milkshake time!"
by Sir Awesome-o October 23, 2010

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