Stator rell (or rel) was an obscenity in Orion Trader's Tongue, with no clear translation.

Both Lasslanlin the Orion pirate and Alonzo Richter used this term.

Lasslanlin's injury-interrupted line "First, ears. Then, mammal, the little pair of- ... stator rell...?" may indicate that this is another body part that a mammal might have two of.

Stator was an obscenity in its own right. The Orion pirate Krulmadden used it to refer to the "stator border patrols" and invented a variation of this term, "statorfleet," as a derisive pun on the name "Starfleet." (TOS novel: Prime Directive)