Home › Words › U › unrepunrepunrep means the act of taking on fuel without putting into port.Among words judged in Lexicurio's Arena, unrep ranks #3,412 of 42,747 for Qualifying.EtymologyShort for underway replenishment.nounThe act of taking on fuel without putting into port.verbTo take on fuel without putting into port.Definitions & examples from Wiktionary (CC BY-SA 3.0).