1. Someone who knows a lot of languages and doesn't use them.
2. Someone who starts learning a lot of languages, but gets bored with them after a few weeks.
1. Bob knows over 12 languages, and I've never heard him speak any other language apart from English. What a language slut.
2. Faye is such a language slut. She starts all these languages, but gets bored with them after only a few days.
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. PenguinBooks,1992. p. 38)