Some humorous 50th birthday slogans are: "50! I demand a recount," "50 years old or 18,250 days young," "50 years old. Bodywork and mechanics need slight attention. Runs on gas," "At 50 you'll have the choice of many temptations, but being 50 also means you'll probably choose the option that gets you home earliest," "At 50 you've seen it all and done it all — but can't remember most of it!" and "Aged like fine wine, complex and fruity." Another 50th birthday slogan is: "Happy 50th birthday! Let's crack open a bottle of prune juice," according to Brandon Gaille.
More 50th birthday slogans are: "Happy 20th anniversary of your 30th birthday!" "Happy halfway to 100!" "I'm not 50, I'm 19 with 31 years of experience," "50 years old, one owner, needs parts, make offer," "Getting old stinks, but it sure beats the alternative," and "Growing old is inevitable. Growing up is optional."
Other funny 50th birthday slogans are: "If you remove all the wisdom and experience in the world of people over 50 then there wouldn't be enough left to run it!" and "I will avenge myself and live long enough to be a problem to my kids!" notes Brandon Gaille.