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