The headword phrase is an abridgment of the last part of Aristophanes, Clouds 1376 (web address 1), with comments from the scholia. The original reads ka)spo/dei ka)/pnige ka)pe/triben ("and he was crushing and was choking and was smashing [me].") Some mss of Aristophanes (followed by some modern editors, e.g. Dover) prefer ka)pe/qliben ('was squashing') for the last word.
[1] The glosses here suggest that the commentator(s) saw an etymological connection between the noun spodo/s ('ash', 'dust': sigma 955) and the first verb in the headword phrase, the imperfect indicative active third person singular of spode/w (sigma 954). LSJ (s.v. spode/w: web address 2) is skeptical.