Slang used here and there by Young People
adj. • Verlan (slang where syllables of words are inversed) for "louche", meaning weird or odd.
"Elle m'a dit qu'elle viendrait à la fête vendredi." "C'est chelou elle m'a dit le contraire."
"She told me she'd come to the party on Friday." "That's odd, she told me the opposite."
4 out of 7 French speakers have heard this