101. Today is worth celebrating because it is the day you made your legendary escape from your incarceration in the maximum security prison of the womb. Let’s raise a toast to the birthday boy’s freedom!
102. To my dear brother-in-law and my true friend, I wish nothing but the best on your special day! May your day be filled with happiness, love, affection, joy and great gifts.
103. Happy birthday, brother-in-law! May you get a chance to fulfill every item on your bucket list and live your life to the fullest.
104. I’m so glad that my sister chose you (and not some jerk) to be a member of our family. Happy birthday!
105. Have the most fantastic birthday, brother in law! May the Lord bless all your future endeavors in life. Have a happy, merry, joyful birthday!
106. Whenever I need help, you always have my back. Happy birthday, brother-in-law. Dependable people like you are rare.
107. Happy birthday to my favorite brother-in-law, I hope my sister is treating you well!
108. It’s your birthday, so feel free to party it up! And if my sister gives you flack for having fun on your birthday, just let me know.
109. God gives awesome brothers-in-law to people who don’t have real brothers. And God exactly did that with me too. Happy birthday.
110. On this special day, I want you to know that you are a great addition to the family, extended brother. Have a happy birthday!
111. Happy birthday to a great friend. You are truly a special person as you have become part of my family. Thank you for being a great person.
112. I hope that you have an amazing day today filled only with happiness, laughter and joy because there is nothing as important in life as being happy!
113. I hope your birthday is as happy and fun as you are dear brother-in-law!
114. Happy birthday, dear brother in law. I hope your birthday is filled with all the things you enjoy and love and also the year following is filled with all the luck you deserve.
115. Just because we are getting older doesn’t mean we can’t have fun. Let’s party it up and have some fun on your birthday!
116. Cheers to you brother-in-law! You’ve made it another year. Just remember, you’re not another year older you are another year better!
117. Sometimes a brother-in-law can be just as good as a brother by birth. Thanks for being a great brother to me. I really hope your birthday is amazing as you are!
118. Thanks for making my sister so happy. She is way easier to tolerate now… Happy birthday!
119. Happy birthday, brother-in-law. I hope your birthday is as incredible as you are.
120. Thanks for being such a cool brother in law. I couldn’t have asked for a more chill and welcoming brother in law! Thanks for all the cool tricks and treats.