When a person mindlessly repeats the exact same sentence/story/joke you just told, and tries to claim it as their own, original thought. The person generally starts saying the same thing that you are saying before you even finish saying it.
Jen: We should go bowling Erin: OMG we should totally go bowling
Jen: STOP ECHOBOBBING ME
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)