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 clam up 3 be in the doghouse 4 have ants in your pants 5 have butterflies in your stomach 6 be a guinea pig 7 get off your high horse 8 beat a dead horse not fit in, be out of place waste your time on something stop being superior not say anything, perhaps because you feel uncomfortable be anxious or excited to do something be nervous be the subject of an experiment be in trouble