It's annoying that you don't already know this.
BIG pet peeve! It's not nacho's it's nachos. It's not our's or your's it's ours and yours. "Ours/yours/his/hers/" are already possessive pronouns, so they do NOT need an apostrophe. And, unless your "nacho" owns something, it does not need an apostrophe - it only needs an "S" at the end to make it plural!!! Rant over.
FOR REAL PEOPLE! Now that everyone I know is on Facebook just tippity-typing away- I can clearly see who wasn't paying attention in school for THE ENTIIIIRE 13 YEARS WE LEARNED PLURALS OVER AND OVER AND OVER. IDIOTS. (or is it plural's and idiot's to you people???)
Pretty much my life for the past 3 years...