Definition of sticker-up in US English:

sticker-up

noun

  • 1Australian. A method of cooking meat by roasting it on a stick in front of a fire; a stick used for this purpose. Compare "stick-up". Now historical and rare.

  • 2A person who sticks up for a person or thing; an advocate, a defender.

Origin

Late 18th century (in an earlier sense). From sticker + -up, after to stick up.