Points for creativity, but excretion is at a different level of organization. At the cellular level, the undigested waste would be filled into "trash bags" and thrown out.
https://publications.nigms.nih.gov/insidelifescience/cells-t...If the garbage can't be digested by lysosomes, the cell can sometimes spit it out in a process called exocytosis.
https://en.wikipedia.org/wiki/ExocytosisExocytosis (/ˌɛksoʊsaɪˈtoʊsɪs/[1][2]) is a form of active transport in which a cell transports molecules (e.g., neurotransmitters and proteins) out of the cell (exo- + cytosis) by expelling them through an energy-dependent process.
http://www.protocol-online.org/biology-forums-2/posts/13781....Cells in liquid media will also spit out your plasmid if they sit in the fridge too long.
https://academicconnections.ucsd.edu/_files/research-scholar...The pIJ790 plasmid has Chloramphenical resistance, but when incubated at 37°C, would be ejected from the cell., meaning that the final transformed cells would not contain this plasmid.
I like ejected, because it reminds me of videocassettes.
https://en.wikipedia.org/wiki/Videotape