Twins that aren't really twins but are equally as cool and look slightly similar and can read each others minds.
Those girls, clearly are amazingly cool and look like twinises.
by Toddles2468 June 02, 2010
the same make and model Mini Cooper seen in a close proximity. You drive and see these increasingly popular cars on the road. You see more than one of these in a row, it's a twini.
I keep passing my twini, and feel like I should wave.
by Max Ryotte September 08, 2010