The act of sticking your finger up someone's butt

When a pearl fish get scared they swim up into a sea cucumber so your finger is the pearl fish and the cucumber is the butt hole

Works best when walking upstairs

When you eat dirt for the first time and leave your family to build a shack in the woods

Someone who is deep in your business, digging around social media etc. Especially if they are uninvited, not in your circle of friends or acting a bit stalker like.

Origin; a pearlfish hides out and lives in sea cucumbers bum.