The Thirder 

A boy/girl who is a third wheel, but is the best because he/she made the relationship successful and happy. But, annoying and funny.

Jiro: Bro, James got our first kiss in 4k.
Jena: I know his annoying but he probably made our relationship official, so he's the thirder

The Thirder by Cr1ms0n May 26, 2023

Thirdary

When you forget that tertiary is a word.

Primary, Secondary, Thirdary.

Thirdary by Grubuck June 19, 2018

Thurder 

a word that relates to the nasal opening (the nose hole(s)) in a sexual way.

The band on SNL: Thurdersex

Thurder by mrs potato dick aka scott April 9, 2010

Thurder 

The nostril, but in a sexual way.

John jizzed in Mary's nose after some wild Thurder Sex

Thurder by johnsuckmycock April 11, 2010

Thinders 

When a woman has thighs that are wrinkled and bumpy like chicken tenders. Also when her ankles are very petite and her hips are plus size; thus resembling the shape of a chicken tender.

Girl#1 "Do you SEE her?!"
Girl#2 "OMG, she TOTALLY has THINDERS"
Girl#1 "Damn, she needs some honey mustard"

Thinders by Stacy's Pillow July 9, 2010

THIRDRAIL 

A live electrical rail that can zap you to death.

a trap put out by the government to kill all graffiti artist.

Thirdrail can kill so watch your step!!

THIRDRAIL by DigDug March 8, 2004

Thinderella 

How people with lisps may pronounce the popular Walt Disney character "Cinderella"

i weally want to watch thinderella cause Kneel's defintion ssssucks

Thinderella by LaLa90 January 15, 2009