to think of something, to make up, to make up out of thin air, to invent (false stories, figures, etc.), to pull out of one's ass (fabricate a claim with no factual basis or evidence)
çekim: geçmiş sog mir aus den Fingern · ortaç sich aus den Fingern gesogen · şimdiki saugt sich aus den Fingern · ulaç sich aus den Fingern saugend
köken: Literally, “to suck out of one's fingers”. Compare Dutch uit de duim zuigen, Czech vycucat z prstu, Russian вы́сосать из па́льца (výsosatʹ iz pálʹca).