1 definition by Mietere

(Noun) A noise a xeno/alien emits when expressing joy, pleasure, excitement, satisfaction, or other positive emotions.
(Verb) A declaration of sexual interest towards xenos/aliens. Can be compared to "yiff" towards furries.
(Noun) "The alien let out a trill when found a lone cow in the pasture to abduct."
(Verb) "The alien was not prepared for the farmer's trill intentions, who had just been abducted while wearing a cow costume."
by Mietere December 21, 2022
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