smoothy adjective 1noun 1forms 5 adjective1 •(informal, nonstandard) Characterised by smoothness.It will make your life smoothier and more enjoyable. — 2001 noun1 •(informal) Someone (usually a male) who undergoes extreme body modification to have his testicles, scrotum, penis and sometimes nipples or otherwise all sexual stimuli removed. formssmoothies · more smoothy · smoothier · most smoothy · smoothiest