Really? I don't know if you're joking here or not! In case you genuinely don't get it... In a busy restaurant it might take a long while for the server to come and take your order. If you're made to wait then most servers will say "I'm sorry for your wait" when they finally take your order, meaning they're sorry they took so long to get to you. Wait (time) and weight (mass) are homonyms (different spellings but sound the same when said aloud). Instead of saying "sorry for your wait" (meaning I'm sorry I took so long to serve you)... they say "sorry for your weight" (meaning I'm sorry you're fat).  It sounds exactly the same so the customer wouldn't know they were being insulted, they think the server is being polite rather than calling them fat.