lechy /ˈlɛt͡ʃi/ adjective1 •(informal) Like a lech; lecherous, tawdrily lustful.The brilliantly senile Arthur, along with Doug’s lechy, creepy friend Spence (the pro stand-up Patton Oswalt), present a fair challenge to his frankness and naïveté. — 2007 formsmore lechy · most lechy