smůla

Etymology
, from.

Noun

 * 1) pitch sticky, gummy substance secreted by trees
 * 2) bad luck
 * 3) resin solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers
 * 1) resin solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers

Declension
The form smola is more common in Moravia.