Matching Pairs C22U4LA Voc Not bOnline version What do these idioms mean? Match the columns. by Modern English 1 have butterflies in your stomach 2 be in the doghouse 3 be a guinea pig 4 beat a dead horse 5 get off your high horse 6 be a fish out of water 7 have ants in your pants 8 clam up stop being superior not say anything, perhaps because you feel uncomfortable be in trouble be anxious or excited to do something not fit in, be out of place be nervous be the subject of an experiment waste your time on something