A “Hat Tip” is giving acknowledgement to a reader or source that brought something up to your attention. For an example, I will be giving many hat tips to Fabulously Frugal for their help on coupon deals and coupon stacking. Fabulously Frugal recently posted about a $1 off BIC pens coupons that you can use at Wal-Mart for a FREE pack of pens. I was not aware of this and were I to post it on my blog I might then give them/their site a hat tip.