0721

Japanese

Etymology

This is a play on words, using the Japanese reading of the Latin letter O, which is オー (ō), for 0; for the digits 7, 2 and 1, using first syllables of their respective on'yomi. Finally, the word reads オナニー (onanī, “masturbation”).

Noun

0721(オナニー) • (onanī) 

1. (slang) masturbation