since... the incident 

A phrase popularised by Australian YouTuber frezned. To be said ominously after saying something that has or has not happened. It has an even more powerful effect if you ask/bribe some friends/passers-by to shake their heads and tut immediately after you have spoken.

I haven't eaten marshmallows and ketchup since... the incident.

No one has seen Jennie since... the incident.

I've been wearing odd socks since... the incident.

since... the incident by purple_beret January 21, 2012

sincere 

Truth and honest to ones feelings on a matter.. To REALLLY mean what is being said and done.

I am sincerely sorry for my stupidity

sincere by alligator food February 3, 2010

Vaginal synchronization 

When several women, who have never or hardly met, start spending time together and theirs vaginas synchronize and decide to bleed on the same day.

When Karen, Lauren, and Mary started running together their vaginas went under vaginal synchronization and they all perioded on the same day.

Vaginal synchronization by Opniortion February 19, 2010

sencere 

Sencere is the most kindest , sweetest person, and can sometimes be mean If you mess with him or his friends. He I faithful and loyal to any relationship he is in.

Girl, my man is nothing like a sencere.

sencere by Btfuuwatson November 10, 2013

Sincerely Beloved

A Christian band from Windsor Ontario, Canada. They rule!!

I just saw Sincerely Beloved

Sincerely Beloved by Ben McBen May 17, 2009

Synchronidiot 

A stupid driver who subconsciously always matches the speed of anybody driving in the lane next to them.

I tried to pass the guy who was driving slowly, but as I caught up to him, he turned out to be a synchronidiot, and I had to speed up to get around him.

Synchronidiot by Mr_Shifty June 17, 2016

perfectly sincere popcorn 

an act or action that stands in a state of unselfishness that is so pure it is entertaining and possibly odd.

When he saw that she was about to step over a puddle he instead took his pants off and placed them over the puddle. It was perfectly sincere popcorn.

perfectly sincere popcorn by ben claude May 5, 2003