har de har
/ˌhɑː dɪ ˈhɑː/originally US
exclamation
Representing laughter, chiefly used sarcastically as a mirthless or disparaging response to a remark intended to be funny or witty. Also as noun and attributive.
Origin
1950s. Alteration of ha ha, after e.g. hi-de-hi, hi-de-ho, whoop-de-do.