On swear 

A mix of the phrase on god and I swear.

use on swear when your homies say some real g shit and you can’t decide whether it’s on god or I swear !!!!! On swear !!!!!

Aleiza: “That nigga tit do be thick asf”

Ashley : “On swear!!!”

On swear by Pussy_destroyerXX April 7, 2019

on swear 

sort of like “on god” and “swear” mixed together

i’m not doing this shit on swear

on swear by theogmilkman May 16, 2022

i swear on my timbs 

Some shit some crazy york niggas say, swearing on the timbs is the absolute highest degree of swearing on something, even higher than yo mamas grave deadass b, the worst part is once you start saying this shit youll never stop even if you dont got no fuckin timbs youll still be swearing on em....

I swear on my Timbs nigga i stole your baby mama and the baby too, they mine now deadass b!

i swear on my timbs by welcometothe6 April 22, 2018

i swear on me nans grave 

An expression usually used by chavs and the like who want to sound honest and trustworthy. Should (almost) always be interpreted as "I'm lying through my teeth".

"m8 i dont no were ur weed is i swear on me nans grave i dint steal it m8"
"kev i swear on me nans grave i aint never cheated on u"
see also: chav, charver

i swear on me nans grave by narglewarglewoo May 19, 2016

ill bash your fucking face in i swear on me mom 

A mlg slang line used from being triggered or angry in a match

After losing the match, Billy said out loud, "ill bash your fucking face in i swear on me mom!"

ill bash your fucking face in i swear on me mom by Skoroca July 2, 2017

Swear on the stew 

Swearing on the stew is a term that is to tell the truth, kind of like "No Cap" . This was made popular by the youtubers Miniminter, Zerkaa, Vikkstar, and Ricegum. To swear on the stew you put up right hand and make your palm face forward, then you make a fist with your left hand and say "I swear in the stew" as you move your left hand left to right.

Zerkaa: swear on the stew if your telling the truth

Miniminter:"I swear on the stew"

Swear on the stew by GabeCorrigan69 October 21, 2019

Swear on the dog's life 

A phrase used to easily coerce a confession from a guilty child.

"Timmy, did you break the vase?"
"No."
"Do you swear on the dog's life?"
"I broke the vase."

Swear on the dog's life by GoYouOneMore November 29, 2012