Definition of lump verb from the Oxford Advanced American Dictionary

Oxford3000

lump

verb
/lʌmp/
 
 
lump A and B togetherlump A (in) with B to put or consider different things together in the same groupYou can't lump all Asian languages together.IDIOM

lump it

(informal) to accept something unpleasant because there is no other choiceI'm sorry you're not happy about it but you'll just have to lump it.That's the situation—like it or lump it!lump it