Adj. A woman with more than two breasts.
Damn that girl is lumpacious
by VaginalErection January 14, 2014
Someone who is annoying, disgusting and irritable.
That boy is so lumpacious!
by wilissa12345 February 09, 2014
Its a mix of lumpy and spacious
That is such a lumpacious brick wall!
by cynthiaserv26 January 13, 2014