Son of Man

“Son of Man” = the bodily emission produced by a human male

Epiphanius Panarion

καὶ τό «ὅταν ἴδητε τὸν υἱὸν τοῦ ἀνθρώπου ἀνερχόμενον ὅπου ἦν τὸ πρότερον»,
and the saying, “When you see the Son of Man ascending to where he was before,”

τουτέστιν τὴν ἀπόρροιαν μεταλαμβανομένην ὅθεν καὶ ἐξῆλθεν,
that is, the discharge / emission (semen) being taken back up to where it came from,

Son of Man == discharge / emission (semen)
- the bodily emission produced by a human male
ascending to where he was before == being taken back up to where it came from
- the “origin” is Jesus's body itself, when they said "we eat it"
- ὅθεν καὶ ἐξῆλθεν — the place it physically exited from
- μεταλαμβάνω - to take into oneself, to ingest / consume (implies oral or absorbtion)

Epiphanius is saying "They even claim that when scripture speaks of the Son of Man ascending, it means the semen returning to the body from which it came."

Basically: “They have reduced the Son of Man to semen, and ascension to bodily recycling.”

Therefore:

“Son of Man” = the bodily emission produced by a human male