batty /ˈbæti/adjective 2noun 2forms 3 adjective2 •(slang) Mad, crazy, silly.He had left too fast. He must have seen the girl. He couldn't be sure she was too batty to see him. — 1939 •(no longer used) Belonging to, or resembling, a bat (mammal).And from each other look thou lead them thus Till o'er their brows death-counterfeiting sleep With leaden legs and batty wings doth creep. — 1595 noun2 •(slang) The buttocks or anus.He kick the boy down and beat the boy back and batty and leg. — 2014 •(UK, offensive) A homosexual man. formsbatties · battier · battiest