also: よう · よお
Casual, friendly call to get someone's attention or greet them. Often used among friends or in informal situations.
Hey, how are you?
Yo, long time no see!
Come on, hurry up and come!
It's okay, hey, don't worry.
Variant spelling with お; also represents the lengthened sound.
Standard hiragana spelling; less emphatic than よー.
Lengthened form of the interjection/particle よ, used for added emphasis or friendliness. The exact origin of よ itself is uncertain, but it has been used as a sentence-final particle since at least the Edo period.