When one twin is clearly more attractive, cool, or likable than the other twin. After suffering through a lifetime of people asking where the "hotter" or "funnier" twin is, the less desirable twin inevitably forms a "chip" on his or her shoulder, thus making the chip twin even less enjoyable to be around.
1.
Party host: "Where is Andy? I love that guy. He's hilarious."
Chip twin: "Why is everyone always asking me where Andy is? How should I know? I don't know where he is all the time! I'm just as funny as he is!"
Party host: "Listen chip twin, you're not invited unless you are with Andy. Robin didn't go around trying to fight crime on his own."
2.
Guy at bar: "So how do you two know each other?"
Chip twin: "We're twins."
Guy: "No, seriously. How do you know each other?"
Chip twin: "We are twins."
Guy: "Come on. Seriously, how do you know each other?"
Chip twin: "You're an asshole."
*Twins walk away*
Guy: "What did I say?"
*Guy 2 walks up*
Guy 2: "Fucking chip twins, man."
Those dumb dorm room sheets. Or a band. You decide.
"yo, why is everyone talking about Twin XL??"
"idk, do you follow bands or are you in college?"
A boy who stuffs a dildo up his throat until he coughs up blood. While fingering a rhino
Why do you act like quentins twin?
An awesome friend who might as well be your twin.
You're my twin-chan.
when you are watching porn and the guys dick looks just like yours.
I just watched a video with a celebrity and realized my dick was almost identical.
I saw my friend while we were pissing and noticed we are definitely not dick twins.
Possesser of unfeasibly large testicles with potential to spawn multiple embryos with just a casual glance.
Also so named as a result of the ability to create two individuals out of a single winger.
Preavalent in urban sofa environments since the mid 80s.
Questionable parentage.
Dood, don't deke the Twin Maker, he'll fuck you up!
Where two women living in close quarters time of the month, moves in sync with one another, thus becoming Blood twins!