Deins is a Filipino slang word coming from the Filipino phrase "hindi naman". English equivalents would be "hell no" or "no way" although these are only equivalent in the sentiment of use and not the literal translation as there is no specific English translation for "naman".

Dein (without the s) is also used in the same context.

It is believed to have originated in the South of Metro Manila, specifically the Alabang region, but is coming into wide usage all over Metro Manila.
Karla: Did you make out with that guy last night?
Bea: Deins, girl. He was hella fugly!
by thebeatkid April 20, 2009
A socially awkward male, usually in his teens. His strange behaviour is often accompanied by regular twitches and friskyness towards the female variety.
"oi, that guys constantly twiching and he's totes being odd?"

"nah man, that's just dein..."

*awkward silence*
by ihaveaggressivediorrhea December 10, 2010
"fit you dein?"
--what you doing?--
by *Brodi* August 2, 2004
"Deine Mutter"-jokes are often used among German teenagers. You can use them to insult someone (or his/her mother).

Otherwise you can use "Deine Mutter!" -> "deine mudda!" (pronounce it die-ne mu-dah) as a slang for "shove it" or when you want to deny sth.

And you can compare it with "your mum".
As an insult:

- "Deine Mutter steht vor KiK und schreit "Nur ich bin billiger!"."
(Your mother stands in front of KiK (that's a cheap boutique, where nobody wants to buy his/her clothes) and shouts "Only I am cheaper!" (cheaper in the meaning of slutty))

And as "shove it":

- "Bring doch den Müll runter"
(Carry off the trash)
- "Ey, deine Mudda!"
(Your mum!)
by your mum's affhole December 4, 2009
comes from "deine mutter" and means "your mother" in german. used as an insult, often used by kids who play counterstrike and get pissed when losing. german pendant to yuh mudda
player 1: "haha headshot du n00b kiddie"
player 2: "deine mudda du huso"

"deine mudda arbeitet auf nem fischkutter als geruch" which means "your mother works as odor on a fishing trawler"
by 4bdulf4r4d November 4, 2006