tearaway

[tair-uh-wey] /ˈtɛər əˌweɪ/
adjective
1.
designed to be easily separated or opened by tearing:
a box with a tearaway seal.
noun
2.
British. a wild, reckless person.
Origin
1825-35; adj., noun use of verb phrase tear away
British Dictionary definitions for tear away

tear away

/tɛə/
verb
1.
(transitive, adverb) to persuade (oneself or someone else) to leave: I couldn't tear myself away from the television
noun
2.
(Brit)
  1. a reckless impetuous unruly person
  2. (as modifier): a tearaway young man
Idioms and Phrases with tear away

tear away

Remove oneself unwillingly or reluctantly, as in I couldn't tear myself away from that painting. [ Late 1700s ]