This Funny Birthday Sayings web page has for your free non commercial use a collection of humorous (and possibly a little insulting) messages concerning the celebration of a birthday which are suitable for inclusion in a card or text message.
Enjoy this brief interval between birth and death Particularly today Happy Birthday
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29 Forever!
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Birthdays are like busses, never the number you want.
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Can't remember how old you are - I'm no good with big numbers.
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Don't take life too seriously, it is not permanent
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As you get older you stop being cute, and start being eccentric.
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Age is just a number. Best not tell anyone which one.
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Another year older, Another year wider.
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Look on the bright side. In dog years, you'd be dead.
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It has been said that a birthday is an opportunity to connect or reconnect with a loved one, and celebrate with them. While this is certainly true, it is also a great opportunity to tease them about their age. Go on, do it - they probably teased old people when they were young, and what goes around comes around. Of course this only works if they are older than you, or if you can persuade them that they are older than you. If you cannot pull this off, tease them about something else instead - they'll love you for it.