“Shinji” by itself is a big clue, because it’s the kind of name that travels across fandoms. In most cases where users say “Shinji” in a meme context, they mean a character known in anime circles. But the phrase you’re asking about doesn’t always spell out which series, which character, or which visual style.
That ambiguity is exactly what fuels confusion. Some posts may mean the same “Shinji” but come from different edits. Others may use “Shinji” as a generic stand-in for a vibe—awkward, intense, comedic timing—rather than a direct reference to one canonical character.
From an information-quality perspective, the safest approach is simple: treat “Shinji” as a likely fandom reference, then verify by checking the actual video thumbnail, character design, and on-screen cues. If the visuals match a specific character’s known look, you’re probably looking at a direct reference. If not, it could be a more loose, remix-level “Shinji” usage.