Green’s Dictionary of Slang

womp adj.

[whomp v. (1)]

(US) of a situation, bad, problematic.

[US]A. Rodriguez Spidertown (1994) 51: ‘You focked up, bro’. I mean, what were you doin’? Whassup wit’chu?’ [...] ‘I don’t know, man. It was womp tonight.’.

In exclamations

womp-womp!

US campus excl. of despair, disappointment, self-pity.

[US]C. Eble (ed.) UNC-CH Campus Sl. Spring 2014 16: WOMP WOMP — expression of disappointment, bad luck, self-pity X: ‘Are you going to Franklin St. tonight?’ Y: ‘No. I have a test tomorrow. Womp. Womp’.