If you get an 'A' (GRADE) in drinking beer from a BELL (your BELL GRADE), they'll call you SIR BEERS.

Only SERVE-ME-A (Serbia) "bell"-grade (belgrade) beer

Imagine the bell (BEL) signals the end of your exam and the time to get your grade (GRADE). You hand the paper into the teacher, a giant bee, you say, "Excuse me Sir" (SER). The bee buzzes back, "I hope you get at least a B" (BIA).

Serve beer to your belgraders and you'll likely be fired.

You walk into your old third GRADE class to find loud BELLS (bel) ringing consistently. Then you realize it's the chef who's shouting "SERVE HERE (serb ia)!"

Do not go to Serbia unless you have a bell-grade (quality) car