n. A snide or sarcastic remark delivered subtly so that the subject does not see or recognize the criticism.
2016
Paul Krugman: undersnark virtuoso
2016
Undersnark is stealth snark, borderline snark, the thematic undertweet of snark ecosystem. Undersnark can provide plausible snark deniability
2013 (earliest)
@Sainsha Not like a slightly questionable comedy version then? I thought you might be hiding an undersnark in there. #undersnark
@Mibs131 Well, yeah. Did I undersnark there? Sometimes I toe the line…