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