Pinkied

Made a pinky promise using your pinky finger.

Dad is reading me a book tonight, he pinkied me.

horizontal pinky

Cosplay involving steampunk attire and sex on a velvet lined pool table, pool cue optional

Last night got a bit wild, ended up doing the horizontal pinky with a girl from idaho

Pinky Siblings

When two people have kissed the same person, the later person has the first persons spit.

Jennie kissed Dylan who was Sarah's ex-boyfriend. Jennie and Sarah were then pinky siblings because Sarah had Jennies spit.