To have the features of an elf- pale skin, closely cropped hair, high forehead and, most importantly, eyes which slant upwards.
Elfin people come only from Nordic countries.

To go out with the intention to pick up and have sex with members of the opposite sex who are of limited height. The use is similar to how the word "hogging" can be used to describe a similar act with members of the opposite sex who are overweight.

A euphemism to be used in polite company in place of the vulgar adverb "fucking"

Participating in or viewing porn involving elves or elf like beings.

having elfish qualities

"Elfin" is a condition when a bar is full of all these dorky and squirelly white men and NO women.

Goodie to shoes and asks for homework

George S get @ me