sibol 

A person with incredibly low self esteem and procrastinates a lot.

You're being a sibol.

sibol by It's britney biatch June 18, 2021

Sibombe 

An extremely bad pronunciation of the German 7B (Sieben b), caused most of the times by indianness.

Dude, did you just hear Janani say Sibombe to the waitress? She was totally shocked!

Sibombe by iamclearenough October 30, 2013

Younger sibling

A little pest who likes to burst into your room while your doing homework, or playing on your phone. They like to hit you, then like a little bitch, they tell your parents when you hit back. In other words...they are annoying. They are so annoying they make you feel like banging your head against the wall so hard you lose all your brain cells.

You: *on your phone*

Younger sibling: *bursting into your room and runs up to you* Hey!

You: Go away.

Younger sibling: No! *Slaps*

You: *Slaps back*

Younger sibling: ....MOooOOoOoM *ugly sobs*

You: GODDAMNIT *bangs head against the wall*

Younger sibling by Crippled and depressed March 29, 2019

National Slap Your Sibling Day 

A national holiday where you can slap your siblings! It’s a wonderful day.

“Hey, sister.”
“Hey, what’s up”
“Happy national slap your sibling day!”
“Wha-“
*slaps*

National Slap Your Sibling Day by yourveryownmother October 28, 2020

Slap your sibling across their face day! 

On the 1st November, you can slap as little or as many of your siblings across their face

“Hey! It’s national slap your sibling across their face day!”

Slap your sibling across their face day! by Reetusthedinostomper October 26, 2019

Sibelius 

1) The most prominent (And just about only) Finnish composer. Lived from the late nineteenth century well into the middle of the twentieth. Famous for his seven symphonies, particularly the second and the fifth. Also produced such well known classical pieces as 'Finlandia', Finland's unofficial anthem, Valse Triste', his Violin Concerto, and his choral symphony 'Kullervo'. Although he lived up to 1952, he did not compose any new pieces after approximately 1920.

2) A music notation program known among the musical community for being annoyingly overpriced and very useful at the same time.

Sibelius is the only composer I know who can write music that reduces an entire audience to tears with his music (well, rappers can, but in a different way)

Sibelius by Lemminkainen September 6, 2010

Soul Sibling 

A friend who you are very close to and see and talk to almost everyday; it's as if they were your brother or sister; they are like family to you.

Your personalities match perfectly and you get along very well. You can tell them anything and they can tell you anything. Your souls are in sync.

Similar to brother from another mother or sister from another mister but no relatedness is implied.

1) Craig and Danielle are my soul siblings.
2) You see that guy over there, he is my soul sibling.

Soul Sibling by friendsfreak1989 November 6, 2010