Emphatically exhibits the sincerity of your seriousness. The classic use is to close a letter with it.
Dear Urban Dictionary:


Thank you in advance for considering “sinseriously” in your Urban Dictionary.

Were sinseriously to be included in The Urban Dictionary, that would make my day, perhaps even my week.

Sinseriously,
Cyprus Denton Fekks
作者 Cyprus Denton Fekks 2010年2月19日
To be sincere and serious at the same time.
"Dude, sinseriously, im sorry"
作者 LilRayRay 2008年7月24日
"sinseriously" is a super fun loving word that can be used to sign a card with. It is a great way to let someone know how much you care about them and that you are serious and sincere about everything you wrote on a letter. It is a cherry on top.
Thanks for being my friend and i hope you enjoy your present

"Sinseriously", Joe
作者 valkayerie 2011年7月09日

免费每日邮件

输入你的邮箱地址,每天早晨收到免费的“每日城市之词”

邮件由 daily@urbandictionary.com 发出。我们决不会发送垃圾邮件。

×