Answer，ShallwegooutfordinnerExplanation，Thisisanexpressionusedtosuggestgoingouttogethertohaveameal。Extension，TheantonymofShallwegooutfordinnerwouldbeWouldyouliketohavedinnerathomewhichmeansmakingandeatingamealatsomeoneshome。Itsuggestsstayinginratherthangoingoutforameal。