1.HBIa small insect that lives in large groups 蚂蚁 →4 See picture of 见图 INSECT
2.have ants in your pantsspoken to be so excited or full of energy that you are unable to sit or stand still – used humorously 坐立不安;躁动不安〔幽默用法〕
Examples from the Corpus
ant• How damaging are ants to plants?• You can see families on outings alongside the drive below you, looking like ants at their own picnic.• A million redants crawling inside a silksheet, that was what I should have seen.• In spite of all we could do, several snakes died as a result of the ant bites.