Other terms for truancy include playing hooky (American English), skiving off (British English), wagging (Australian English). Attending school but not going to class is called skipping class, cutting class, flapping or, more formally, internal truancy.
Why is it called wagging school?
Contributor's comments: To wag school was to skip classes or school usually in the company of others: "Let's wag school today." Contributor's comments: "Wag" was certainly the term used for truant by my parents - Sydney and NSW country - and by us in the 1960s in Sydney.
What does wagging mean in slang?
British Slang. to play truant; play hooky. SEE MORE. noun. the act of wagging: a friendly wag of the tail. a person given to droll, roguish, or mischievous humor; wit.