From smile + -y (adjectival suffix). The noun is from the adjective, after smiley face.
Meanings
A simplified representation of a smiling face.
(Internet) A sequence of text characters used to represent a mood, especially :) or :-) or other depictions of smiling.
How do you type the angry smiley?
(rare) An improvised street weapon consisting of a length of chain with padlocks and other heavy objects affixed to one end.
(South-Africa) A roasted sheep's head.
A piercing worn in the upper frenulum (upper lip).
Smiley/Scrumper and Frowny Smiley and scrumper are both names for a piercing of the upper frenulum that attaches the center of the lip to the gums. [2011, Elayne Angel, The Piercing Bible: The Definitive Guide to Safe Body Piercing, Crossing Press, →ISBN, page 118:
tr gülen surat (representation of a smiling face) · mk смешко (representation of a smiling face) · ru сма́йлик (representation of a smiling face) · tr smiley (representation of a smiling face) · sl smeško (representation of a smiling face) · et smaili (representation of a smiling face) · mk смајли (representation of a smiling face) · ja スマイリー (representation of a smiling face) · ro față zâmbitoare (representation of a smiling face) · sh смајли (representation of a smiling face) · fi kestohymy (slit throat) · de Emoticon (representation of a smiling face) · sv smiley (representation of a smiling face) · nl smiley (representation of a smiling face) · sh smjȅško (representation of a smiling face) · sh smajli (representation of a smiling face) · es emoticono (representation of a smiling face) · be смайл (representation of a smiling face) · fi hymiö (representation of a smiling face) · sh smȅško (representation of a smiling face) · ko 스마일리 (representation of a smiling face) · th สไมลีย์ (representation of a smiling face) · ro zâmbilici (representation of a smiling face) · uk сма́йлик (representation of a smiling face) · pl buźka (representation of a smiling face) · hy ժպիտիկ (representation of a smiling face) · fi hymynaama (representation of a smiling face) · sh сме̏шко (representation of a smiling face) · be сма́йлік (representation of a smiling face) · uk смайл (representation of a smiling face) · da smiley (representation of a smiling face) · cs smajlík (representation of a smiling face) · hu smiley (representation of a smiling face) · cmn 笑臉 /笑脸 (representation of a smiling face) · fr smiley (representation of a smiling face) · sh смје̏шко (representation of a smiling face) · hu mosoly (representation of a smiling face) · eo ridetulo (representation of a smiling face) · ru смайл (representation of a smiling face) · fr émoticône (representation of a smiling face) · ro smiley (representation of a smiling face) · pt smiley (representation of a smiling face) · de Smiley (representation of a smiling face)