(Australia, New Zealand, colloquial) a health campaign in Australia and New Zealand exhorting people to "slip on a shirt, slop on sunscreen, and slap on a hat" when they go out into the sun in order to prevent skin cancer.

Third-person singular simple present indicative form of slop out

The practice of using a bucket as a toilet, usually in prisons. / The act of emptying a bucket which has been employed as a toilet.

(mathematics) A field of plotted slopes of a differentiable function.

An area of ground that tends evenly upward or downward. / The degree to which a surface tends upward or downward.

(obsolete) slopingly

(obsolete) Sloping.

(intransitive) To tend steadily upward or downward. / (transitive) To form with a slope; to give an oblique or slanting direction to; to incline or slant.

(geology) The transportation of rock and soil down a slope by rain; the material so transported

(geology) The steep, narrow fringe separating the coastal zone from the deep ocean