It’s all about love and mostly hate when it concerns your sister. Not the real hate, but more exactly the fighting kind just because it is your sister. However, when it concerns her birthday, you need to wish her in the very nicest of ways or the very ironical of ways. But eventually, whatever ways you chose, the feeling is there and it counts for your sister. Hahahumor has brought to you this list on the most funny sister birthday memes you can find and perhaps use to send to your sister on their birthdays.