aquellar

An unusual, informal placeholder verb built directly from the demonstrative aquel/aquello — used the way English speakers say "to whatchamacallit" or "to thingy," standing in for any verb the speaker can't remember, doesn't want to name, or is avoiding for delicacy's sake.

• Ya sabes, aquella el asunto antes de que lleguen. — You know, take care of the thing before they arrive.
• No me acuerdo cómo se dice, pero aquéllalo tú. — I don't remember how to say it, but you go ahead and do the thing.
• Aquellaron toda la noche y nadie quiso contar los detalles. — They did the thing all night and nobody wanted to share the details.

Treating aquellar as having a fixed, specific meaning — its entire function is to be vague; trying to pin down a precise definition misses the point of a placeholder verb whose meaning is supplied entirely by context or left deliberately unstated.