The routine seems to be whimsical and about the relevance of Latin to life today. He likes to conjugate Latin verbs, but has it under control. I found an explanation online. From that account of his routine:
"Sometimes you’re queuing at a petrol station at 3:00A.M. in the morning, and there’s a line of murderers behind you, and you turn around and go, “Amo, amas, amat, amamus, amatis, amant!” and they go, “F**k! He knows Latin! (mimes running away) He knows a dead language! Run! Head for the hills! Head for Azerbaijan! Run down the forecourt”
By itself, the line doesn't have much meaning. It is an introduction to what follows.