Meaning

noun someone who ships goods

noun a company in the business of shipping freight

originFrom a clipping of relationshipper. Relationshipper emerged in early online fandom of the television series The X-Files as a term for fans who supported the possibility of a Mulder/Scully romance. It was shortened to r'shipper, then 'shipper, and finally shipper. By surface analysis, ship (“to create a fictional romantic relationship”) + -er.

Etymology from Wiktionary, CC BY-SA 3.0