Dictionary Definition:
Anottāpin & Anottappin (adj.) [fr. anottappa] not afraid of sin, bold, reckless, shameless D iii.252, 282 (pp; ahirika); Sn 133 (p; ahirika +); It 27, 115 (anatāpin anottappin, vv. ll. anottāpin); Pug 20, 24.