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