Providing a boop to another being's nose or snout (stylized as snoot), preferably in a gentle or affectionate manner. Often, this is something one feels the need to do to cute animals. When animals boop each other's snoots, the general attitude of the boop must be taken on a case-by-case basis.

A euphemism for “kill me” now that composting oneself after one’s death has become popular.

A gentle poke or tap on the nose.